Taiki Kudo is an upbeat boy with a desire to help those in need, although he tends to overexert himself. One day, he hears the voice of a Digimon named Shoutmon who is on the verge of death. Wanting to help him, Taiki is given a Digivice known as a Xros Loader, and he and his friends Akari Hinomoto and Zenjiro Tsurugi are warped to the Digital World where they meet Shoutmon and his allies, Ballistamon, Starmon and the Pickmons. By using the power of the Xros Loader, Taiki can perform a DigiXros, which can fuse any of his allies together into different forms. Taiki and his friends use this ability to fight the forces of the Bagura Empire while crossing paths with teams Blue Flare and Twilight.
Xros Heart arrives to Canyon Land where the Earth-god General Gravimon, having learned of his fellow Death Generals' defeat, has ordered all his forces to gather around his fortress. Planning to use his group as a diversion for Xros Heart to take the castle by surprise, a plan that Taiki accepts, Kiriha finally reveals he came to the Digital World to become strong. However, once he and ZeekGreymon manage to storm the castle while using their Blue Flare team to take out the Death General's force, Gravimon reveals that he was a step ahead the entire time. Despite having JetMervamon help the Xros Heart United Army escape, Taiki learns that Kiriha is captured. And, to make things worst, Gravimon uses Kiriha's shady past to turn him into his pawn to defeat Taiki.
Kiriha is tricked by Gravimon into believing that Taiki is the reason he could never achieve his goal to be strong as the boy is consumed by the darkness in his heart. Tension runs high as a fight breaks out among the Xros Heart United Army with Taiki being hesitant fight back against Kiriha. Although the core Digimon from both sides were injured badly, Kiriha refuses to stop fighting until Deckerdramon stops it and reasons with Kiriha to regain the love that has lost from his heart. The action failed, and caused Kiriha to have Deckerdramon mortally wound for insubordination. Taiki intervenes so Deckerdramon revealed the rest of Kiriha's past. Later, as Kiriha started to understand the source of his love, Gravimon appears to launch an attack from above with Deckerdramon shielding everyone with his own body. Kiriha soon realized that his power lays within the love and bond between him and his teammates. Though Deckerdramon dies due to the impact of Gravimon's attack, his final action gave Kiriha, Taiki and Nene the will to execute Great Xros, a brand new DigiXros with their main Digimon forming Shoutmon ×7.
After being captured, Ballistamon turned back into his original form, DarkVolumon. Despite Kiriha's intervention with Deckerdramon and MailBirdramon, they and OmegaShoutmon are all sent overboard by Olegmon with Taiki tied up. The next day, after begging Kiriha to have him save Ballistamon, Shoutmon has Kiriha save Nene and Taiki while telling the latter to DigiXros him with DarkVolumon in order to reach him. Though it seemed to fail at first, Ballistamon comes to his senses as Shoutmon frees the other Xros Heart members, Lunamon, Coronamon, and Spadamon from Olegmon's spell. Though forming Shoutmon ×4S to lead the defeat of Olegmon's crew, he is unable to fight the Death General. But in a gamble, Ballistamon Xros Opens from the formation to use his ultimate speaker attack which still contains Olegmon's spell to destroy his former leader. Soon after, Spadamon, Lunamon, and Coronamon join up with Xros Heart.
Nene and Kiriha are searching for Yuu while Taiki and Wisemon are working on opening the path that allows them to get back to the surface, without needing to sacrifice either Taiki or Yuu's life. By then, the wounded Beelzebumon and Mervamon set off to find for Yuu, finding the boy before he is captured by SkullKnightmon. As for the badly injured Lilithmon, Whispered DigiXroses her with Blastmon to assume her Demonic Beast Mode while proceeding to negate Hell's Field and erase everything in it. Seeing this monstrous threat, Taiki, Kiriha and Nene quickly form Shoutmon ×7 to prevent both the black and white castles from being destroyed. Informed by Wisemon that both castles are elements crucial to get make their way back to Bright Land, Taiki risks himself to give false death data to unlock the path. Following the success, Taiki faints. As the path opens, SkullKnightmon and Yuu leave the place, followed by the Xros Heart United Army. However, Beelzebumon realizes that Lilithmon survived Shoutmon ×7's attack and remains behind to sacrifice himself while destroying Lilithmon for good. By then, Taiki comes to his senses while realizing the lost of Beelzebumon.
Now in the Sand Zone, Team Xros Heart is suffering from the blazing sun and quickly falls into a sand trap laid by Scorpiomon of the Bagura Army! Then falling deep underground, the team is cornered by a bunch of Scorpiomon just before Revolmon appears and saves them! Only it seems that as a favor for saving them, Team Xros Heart must help Revolmon with his treasure hunt! But it's not going to be an easy task as what's a treasure hunt without some booby traps and battles!? Not to mention the Bagura general Blastmon is currently present in the zone!
Taiki and others arrive in the last Kingdom in the Digital World, Bright Land. They start heading towards the country's tower but Sparrowmon informs that some force field has prevents them to entering it from the sky. On their way, they encounter and attempt to help the country's digimon that was pinned down to the ground by big spikes but was told that only Apollomon (the last Death General) can remove them. Suddenly, Apollomon's army appears, commencing a battle. Learns from the Xros Heart's strenght, the Death General grants them an audience with him on the tower's garden. Instead setting off a fight, Apollomon offers himself to assist the Xros Heart into defeating Bagramon, stopping the ultimate day of destruction 'D5'. Though Taiki believes they can trust Apollomon, it took the Digimon to save the boy's life to convince Kiriha and Nene. Just then, Yuu and Tuwarmon appear and attack while the evil program named Whispered Virus that lays within Apollomon is activated to corrupt the noble Digimon into a form called Whispered. But as the only way to stop the controlled Apollomon is by destroying him, Taiki is conflicted while finding that his lack of conviction has caused him to be unable to use his Xros Loader.
SkullKnightmon along with Yuu escaped from Hell's Field and headed back to the Great Demonic Palace, while Taiki and the others safely reached the Bright Land's surface. Wisemon soon managed to analyze that Apollomon is still conscious despite Whispered being in control. As Kiriha and Nene hold off Apollomon's army, Taiki and his Digimon make their way to Apollomon's shrine. But, as they reach the top, Whispered posed as Apollomon in an attempt to kill Taiki while his guard is down. However, seeing though the deception, Taiki uses OmegaShoutmon to strike the Death General as Kiriha and Nene arrive to form Shoutmon ×7 and the epic battle with Whispered begins. However, after sealing Shoutmon ×7, Whispered starts to collect energy to execute an attack that would destroy all of Bright Land. Though Dracomon and Mervamon free him, Shoutmon ×7 unable to hold the attack off. Seeing this, Apollomon uses his last ounce of consciousness to urge Taiki to destroy both Whispered and himself, as he would rather die than remain a slave with the Digital World doomed. Honoring Apollomon's request, Shoutmon ×7 uses his strongest attack over Whispered, ending the battle and saving the lives of all Bright Land's Digimon. Meanwhile, after reforming himself and learning of Whispered's death, DarkKnightmon plots his next move as Yuu finally accepts the truth as Damemon dies from the injuries he received while fighting in Hell's Field.
After the defeat of all Death Generals, Taiki and the others head to the Bagra Army's Headquarters, Pandemonia. Having been expecting them, the Bagramon turns out to be an illusion with DarkKnightmon dealing with them. DarkKnightmon then reveals the Darkness Stone, the Code Crown that had been infused with the negative energy collected by the Death Generals. He then uses it to revive the soulless Death Generals. As Shoutmon ×7 is formed to hold the monsters off, DarkKnightmon DigiXros them into GrandGeneramon, a destructive beast that cancel off Shoutmon's DigiXros. Later, DarkKnightmon utilize the Darkness Stone to rip off Shoutmon's soul, his DigiCore, before attempting on Taiki's with Dorulumon and Ballistamon sacrificing themselves to prevent it. However, Taiki soon willing let DarkKnightmon to has his soul removed. Ending up at Prison Land, Taiki encounters the Generals' DigiCores who want revenge but Shoutmon, Dorulumon and Ballistamon appear and a rematch between them and the actual Death Generals begin.
As Xros Heart meet the Monitamon of the Shinobi Zone, who have been following their exploits through the Monitamon under Nene, they learn that Blastmon's general Musyamon has taken over most of the Shinobi Zone. They visit a Monitamon training camp and learn that the Monitamon Princess has been taken hostage by Mushamon, who wants the Code Crown in exchange. Just then, a Shurimon arrives and tries to attack the Monitamon Elder, but leaves in exchange for a Samurai DVD. After trickily getting everyone up a cliff, Zenjirō falls off but is saved by a group of Etemon. They are then led to the lair of Karatenmon, who will only give up the Code Crown if someone can make him laugh. Everyone puts on their own acts to make him laugh such as Shoutmon's DigiXros with other Digimon, but with no result. However, Nene, who has lightened up a bit more, joins Akari in a comedy sketch which successfully makes Karatenmon laugh. When he reveals the Code Crown, the Etemon snatch it revealing themselves as spies under Mushamon. Taiki DigiXros Ballistamon and Persiamon into BalliBastemon to seduce the Etemon, before hitting them with a surprise attack and finishing them with the Star Sword. Nene and Akari become friends and Xros Heart regains the Code Crown to rescue the princess.
Taiki and Shoutmon return to the Digital World and land in Dragon Land, knowing that through Lilymon (Shoutmon's old village mate) that there are no longer Zones as the Digital World has been reformated into one floating island where Bagramon reigns from, with seven surrounding Lands, each ruled by DarkKnightmon's Death Generals. Taiki and Shoutmon encounter Dracomon, saving him from a mob of dinosaur and dragon Digimon led by Devidramon. Meanwhile, Kiriha arrives and launches an attack at the Bagra Army's Dragon Land branch while calling out the first Death General, Dorbickmon. Answering Kiriha's challenge, having taking out the bulk of Blue Flare with a pit trap, Dorbickmon arrives in his Darkness Mode and uses his Darkness Loader to Forced DigiXros his Flarerizamon into a flaming sword to easily defeat DeckerGreymon. With some help from Lilymon and Dracomon, Taiki manages to get Kiriha away from Dorbickmon's attack. Realizing Xros Heart's team has returned, Dorbickmon Xros Opens to have Fanglongmon aid the Salamandermon, in destroying Taiki and the rest with their magma. Soon, Dracomon's brave attitude to sacrifice himself in order to save Taiki and the others, causes Shoutmon to digivolve to OmegaShoutmon and defeat the army before Dorbickmon arrives, springing his trap as OmegaShoutmon is buried alive.
Taiki ends up facing Yuu in a sword fight and is losing against him. By then, the Whispered appears and reports of Kiriha's defeat along with DarkKnightmon and Lilithmon chasing Nene, Shoutmon ×5, Beelzemon and Mervamon. Yuu then reveals how he got to the Digital World and his encountering with DarkKnightmon, making the boy to unfold his true nature. Realizing the truth behind the facade, Taiki picks himself up and defeats Yuu while convincing that what DarkKnightmon said was nothing but lies. But, even with Nene attempt to further convince, Yuu refuses to believe and instead DigiXros DeadlyAxemon, all of Apollomon's minions and Hell's fields' evil energy into Tuwarmon, assuming Deadly Tuwarmon Hell Mode. However, as the Xros Heart members gathered to form Shoutmon ×7 and cause some damages on Tuwarmon, Yuu begins to self doubt his faith in DarkKnightmon. Badly injured, Tuwarmon along with Yuu is forced to withdraw from the battle, who then asking him if Taiki is telling the truth.
Taiki ends up facing Yuu in a sword fight and is losing against him. By then, Whispered appears and reports of Kiriha's defeat along with DarkKnightmon and Lilithmon chasing Nene, Shoutmon ×5, Beelzebumon and Mervamon. Yuu then reveals how he got to the Digital World and his encountering with DarkKnightmon, making the boy to unfold his true nature. Realizing the truth behind the facade, Taiki picks himself up and defeats Yuu while convincing that what DarkKnightmon said was nothing but lies. But, even with Nene's attempt to further convince him, Yuu refuses to believe and instead DigiXros DeadlyAxemon, all of Apollomon's minions and Hell's fields' evil energy into Tuwarmon, assuming Deadly Tuwarmon Hell Mode. However, as the Xros Heart members gathered to form Shoutmon ×7 and cause some damages on Tuwarmon, Yuu begins to self doubt his faith in DarkKnightmon. Badly injured, Tuwarmon along with Yuu is forced to withdraw from the battle, who then asks him if Taiki is telling the truth.
In Prison Land, the Death Generals defeated Shoutmon ×3 so easily, but moved by this act of self-sacrifice, Olegmon switch sides to support Taiki against his former teammates, while Apollomon is separated from Whispered to settle their very own battle. At that time, having no intention of keeping his word to Taiki to spare the others, DarkKnightmon has GrandGeneramon to defeat Kiriha and Nene. Later, Apollomon sacrifice himself to help Taiki and his Digimon along with Olegmon in restoring themselves. However, Olegmon died again in the process when the Xros Heart team destroyed the incomplete GrandGeneramon. With their fight against the Death Generals truly over, Taiki and the others head to the actual Pandemonia to face Bagramon and DarkKnightmon while rescuing Yū.
Having heard from Kiriha that he saw a boy who resembled her younger brother, Nene is eager to search for Yū, only to find him and learn that he has been willingly helping DarkKnightmon the entire time. Yū and Tuwarmon then take their leave when Taiki and the others come to her aid, with Nene chasing after her brother. However, Yū summons Doumon to cast a spell on Nene, giving her the delusion of being back in the human world. Tuwarmon whom about to kill Nene was stopped by Mervamon, who emerged from Nene's Xros Loader. Taiki and Kiriha then discovered Nene's exact location and break the illusion as DarkKnightmon appears with Lilithmon (who later been DigiXros with Blastmon and the Vilemon as Gattai Lilithmon by Yū using his Darkness Loader). A chaotic fight soon follows with Doumon destroyed as Yū DigiXros Tuwarmon onto DarkKnightmon for the latter to become MusouKnightmon. OmegaShoutmon and ZeekGreymon are fight in retaliation and the three Digimons' power causes a big bang. As DarkKnightmon and his group depart, Nene makes up her mind to get Yū back at any cost.
Fueled by Deckerdramon's death, the restored bond between Kiriha with Taiki and Nene creates Shoutmon ×7. Although Shoutmon ×7 manages to destroy Gravimon, it is soon revealed, that Gravimon can regenerate himself if his heart is kept safe, by Hi-Vision Monitamon after he sneaks into the castle to investigate before being captured. As Taiki DigiXros Cutemon with Dondokomon, Knightmon, PawnChessmons, Persiamon, ChibiKamemon and Jijimon to form G-Cutemon to hold off Gravimon's army, Nene and Kiriha sneak into the Death General's castle to free the captured Hi-Vision Monitamon and find Gravimon's heart. However, Gravimon expected them to pull off such a plan and DigiXros his remaining forces to assume Darkness Mode while revealing that he secretly transferred his heart into Taiki's left arm during the first battle. Agreeing to Gravimon's demands, Kiriha gives up his Xros Loader in order to save Taiki's life. But when Gravimon attempts to kill Kiriha, Taiki shields his friend while ensuring the Death General would inflict damage on himself. Removing his heart from Taiki, Gravimon unknowingly allows Shoutmon ×7 to heavily wound the heart before Kiriha personally destroys it, marking the end of both Gravimon and the battle, leaving the Xros Heart United Army one more land and then the Bagra Army's Headquarters.
The members of the school's robotics club are frustrated because they keep failing to build a robot good enough to take part in the upcoming competition when they approached by Xros Heart's old friend, Puppetmon, who offers them a chance to take part in a greater project. The next day, while told to deliver a notice to the absent Tokio, Tagiru learns from Taiki that all other members of the robotics club are also absent from school, and fearing it to be Digimon related, he and Yū accompany him to Tokio's house, just to find him working on some machinery. Figuring that Tokio is deceiving his mother in thinking he is going to school to stay home, Xros Heart witnesses Tokio entering into the DigiQuartz through his computer. By following him there, they learn that Tokio and the other missing children have been building a GigaBreakdramon under Puppetmon's orders. Taiki and Shoutmon confront Puppetmon who seems to not remember them at all and launches GigaBreakdramon against them. Tagiru and the Digimon Hunters battle GigaBreakdramon without success. When Ryōma commands Astamon to attack Puppetmon instead, Taiki and Shoutmon risk getting hurt to protect Puppetmon enables him to come to his senses. By DigiXrosing Shoutmon with Puppetmon, Taiki manages to give Arresterdramon an opening to defeat GigaBreakdramon who is captured by Tagiru.
Tagiru's classmate Miho Sudo has been 1st place Honor Student since Elementary, stresses out on improving her grades when she is at 8th place. Miho's desire for the top 7 students to disappear attracts the attention of a Digimon who offers to make it a reality for her. Later, feeling jealous of Tagiru and Gumdramon, Yū meets Miho. Soon after, news of the two top students in their grade, Mishima and Takahashi, being attacked and looking malnourished drives everyone in school in an uproar. Only Miho had no reaction to the event as Yū follows her while Tagiru enters the Digi Quartz and finds the school covered by a vine looking plant whose tendrils are wrapped around Mishima and Takahashi while draining them. Losing the vines' source, a flustered Tagiru and Gumdramon are encountered by Ren as he tells them that can not defeat vine Digimon unless they find its true form. Deciding to help for his own benefit, Ren has Dracmon bite into the vine to expose the Digimon. This not only causes the vine to go on rampage out of pain, but if affects Miho on a sympathetic level as she enters the DigiQuartz and merges with the Digimon: revealed to be Blossomon. Yū's good heart frees Miho form Blossomon's control, who was captured by Tagiru. In the end, Yū win a basketball match, while Tagiru has his nose broken.
The Xros Heart boys join the school's kendo club for the regional tournament and after winning a match, they find that they are being observed by Musashi Kenzaki, a student from a rival school. Later, Musashi ends up in the DigiQuartz and meets Kotemon who takes him as his pupil. Some time later, a mysterious figure starts challenging members from adult kendo clubs throughout the city and beats them to the point of shredding up their clothes. Tagiru and the others figure out that this incident could be Digimon related and investigate by themselves until they find that the mysterious attacker is actually Musashi. Tagiru challenges Musashi for a match and he sees a second blade appearing on his other hand for an instant to block his attack. Musashi flees and Kotemon appears, offering himself to train Tagiru asking him to help bring Musashi to stop following the dark path he is taking. In the tournament, Tagiru challenges Musashi, again, but during their match they get sucked into the DigiQuartz. Ren appears and Tagiru learns that the reason for Musashi's sudden change is because Dracmon is using him to create dark energy, which it uses to Digivolve into Yasyamon. Arresterdramon finds difficulty in fighting Yasyamon, but by Kotemon's request, Tagiru has Gumdramon DigiXros with him and together they defeat Yasyamon, forcing Ren to flee. Back in the human world, Musashi and Tagiru resume their battle, and Musashi wins fair and square, but Tagiru is not sad as both have given their best.
Tagiru, Yū and Taiki go to an okonomiyaki store after school. But the moment the three of them open the door, they go into the world where Digimon live in DigiQuartz, and encounter a Digimon named Pagumon, who loves Okinomiyaki. Tagiru wants to hunt Pagumon. The next day, Tagiru and the others heard about whoever ate the potato chips have either disappeared or flowing in the air. Then Pagumon says "It must be Jagamon's doing!" Tagiru wants to hunt Jagamon so he goes towards the closest convenient store. He stunks looking at the boys and girls who are holding the Potato Chips and flowing in the air, Tagiru goes into DigiQuartz, and plans to hunt Jagamon. However as Tagiru reloads Gumdramon, Pagumon starts to battle themselves. Jagamon notices Pagumon, he sends Gumdramon flying and runs away. They thought that they could find Jagamon, but due to Pagumon's "bad advices", they continue to lose the hunt. Because it's all Pagumon's fault, Gundramon is very angry, and demands Tagiru to reload him from the Xros Loader to capture Pagumon. However Tagiru is defending for Pagumon, and starts to argue with Gumdramon. Gumdramon is mad and goes into Ryoma's X-Loader! Tagiru and Gumdramon are separated from each other. Tagiru goes back home are starts worrying about Gumdramon. Paguman says he still misses Gumdramon but he doesn't admit it. He makes some okonomiyaki but Pagumon confesses that he has never eaten it before, he has just liked the smell. Pagumon decided to eat the okonomiyaki and starts to become strange. Pagumon starts multiplying and goes to every okonomiyaki store in the city. Taiki, Yū and Tagiru meet up at one of the stores. Tagiru tries to capture them with MetalTyrannomon but fails. At that moment, Ryoma comes along and reloads Gumdramon, saying that he doesn't want Gumdramon. Gumdramon thinks of a plan after Tagiru tells them what happened. He asks the chef to make the biggest okonomiyaki that he can. Gumdramon carries the okonomiyaki to the pool with all of
While Tagiru is hunting Zenimon, he has discovered that a mysterious teen named Hideaki Mashimo suddenly appears with a blue-eyed Dobermon and is blocking his way at the Shopping District. Zenimon is a Digimon who likes money a lot and whenever it sits on an ATM machine, the machine will not function properly. In order to overcome this abnormal situation in the street, Hideaki is hunting the Zenimon to get a reward from the shop owner. His main objective is to earn money rather than hunting down the Digimon. His dream is own a takoyaki shop and he is hunting Digimon to save up the money at the same time. Digimon hunting solo is dangerous and he decides to team up with Tagiru, promising that he will share the reward with him. Surprisingly, Tagiru, Hideaki, Dobermon and Gumdramon have encountered a new Digimon named Ganemon. Ganemon is Zenimon's boss and he is trying to capture back the Zenimon, and Ko-Zenimon (a smaller form of Zenimon), who have escaped from his briefcase. According to Ganemon, the Zenimon are all too fast and agile for Hideaki to capture and he gets quite upset over it. He suggests that both Tagiru and Hideaki should team up with him and capture Zenimon, to which they agree to help. Then, in an unexpected turn of events, Ganemon reveals himself to be the Zenimon's leader, after being discovered by Hideaki, and eats money to become bigger and stronger. Arresterdramon and Dobermon DigiXros, combining Dobermon's speed with Arresterdramon's strength to defeat Ganemon. After the battle, Ganemon brings the money back to the markets he got the Zenimon to steal from and becomes part of Hideaki's Digimon Collection.
Tagiru, Taiki and Yū are taken by a Trailmon to an unknown location in DigiQuartz at the request of "a certain person" who needs to meet them. The trio Timeshifts back to the Human World and find themselves in Hong Kong. Yū guides the others around the city until they are picked up by a limo owned by the boy's older sister and fellow Xros Heart member Nene, now a well known idol. Revealing herself to be the one who sent the Trailmon to them, Nene explains that she is being stalked by a mysterious masked man with strange powers and suspects that a Digimon is behind this incident. Tagiru is the most enthusiastic to help Nene, but ends up causing more trouble by attacking and injuring a stage actor after mistaking him for the masked stalker and is forced to fill in. Just then Nene is about to shake Tagiru's hand after a job well done, when the masked man appears and attacks him. Nene's suspicions are confirmed when they find a Harpymon beside him, but the enemy proves itself too agile for them and flees. Taiki concludes that only JetMervamon's speed may cope with Harpymon's and after the masked man appears again, he and the others join forces to stall him until Nene takes a break from her concert to join the fight. However, JetMervamon is defeated by Harpymon and an enraged Tagiru asks Nene to let him borrow Sparrowmon. By DigiXrosing Arresterdramon with Sparrowmon, Tagiru defeats and captures Harpymon. The masked man is then revealed to be Nene's father, who fell under Harpymon's influence due to his anxiety of his daughter's decision to become an idol overseas. With the incident resolved, Tagiru and the others return to the Human World to watch the rest of Nene's concert.
Usually active and passionate students and teachers in Tagiru's school have become lifeless and short of energy. Tagiru suspects that a Digimon is behind this and investigates the DigiQuartz with Gumdramon. Upon investigation, he finds that FlaWizardmon is the one responsible. FlameWizardmon has been absorbing life energy from people to power himself up. Tagiru's passionate energy ends up being absorbed by FlaWizardmon and he himself becomes lifeless. Taiki and Yū find out and investigate the DigiQuartz themselves. Gumdramon stays behind to support Tagiru and eventually carries him to where Taiki and Yū are battling FlaWizardmon. Tagiru finally gains enough passionate energy back and gives his fiery passion of spirit to Gumdramon, Super Evolving him into Arresterdramon. FlaWizardmon is finally defeated and the students and teachers get their energy back.
Masaru Katsuji, a boy in Tagiru's class, seems to be down lately since his family's Ramen restaurant has been getting less customers since the opening of a nearby popular Ramen restaurant opposite them. Tagiru says he will help "Katsuji" to reclaim its popularity, and he and Yū challenge each other to come up with a solution. Later that night, while trying to find a way to improve his ramen, Mr Katsuji gets sucked absorbed into DigiQuartz by the Digimon duo of Ogremon and Fugamon. Though they own a Ramen Restaurant of their own in DigiQuartz with their special hand-pounded noodles, the two oni Digimon offer to give some to Katsuji in return for his delicious soup so both restaurants can flourish. Feeling something is off when the sudden number of customers at Katsuji, Xros Heart learns of Katsuji's deal with Ogremon and Fugamon. After learning that Katsuji willing agreed to help them, despite the three of them working 24/7 taking its toll on the man, the gang decide not to meddle as the oni Digimon are doing no wrong. However, refusing to let his father change from a kind ramen maker to a one yelling angrily at their customers, Masaru challenges his father to a Ramen Contest in which if the boy wins, Katsuji must cut off all ties with Ogremon and Fugamon. With Xros Heart's help, Masaru prepared a soup while their Digimon partners made the noodles. Upon tasting his son's soup, recognizing it as his old recipe, Mr Katsuji realizes that attracting customers isn't as important as making a ramen that warms the hearts of those who eat it, accepting defeat. However, refusing to accept their loss, Ogremon and Fugamon attempt to detain Mr Katsuji and are defeated in the resulting battling against Shoutmon, Gumdramon and Damemon before being captured by Tagiru.
On his way to school, Tagiru meets a transfer student named Makoto Tamura who somehow has the ability to make everyone he looks at become his friends. With Yuu also affected, Tagiru and Taiki suspect a Digimon to be behind it. However, when they attempt to reach DigiQuartz, the two boys, Gumdramon, and Shoutmon find the schoolyard in DigiQuartz blocked. As it turned out, Makoto's ability to make friends was arranged by Phelesmon in the guise of an angel, who intends to perform a "Sacred Ritual of Friendship".
Fireballs are appearing at telephone box which is located in front of the ruins. Furthermore a strange and freaky voice "H~E~L~P M~E" can be heard through telephone receiver. Learning of this rumor, both Tagiru and Yuu are suspected that a Digimon is behind it and resolve to catch it. When they reached the destination, meeting a teen named Kaoru calls him a "Supernatural Hunter" and intends to solve the "supernatural incident" with science fact. Finding the identified the telephone box and compare it with the uploaded video, they notice that the fireballs, disappear in a rundown drive-in. While exploring the Drive-in, the three end up in a cave and find portable gaming device that is the source of voice. Ending up in DigiQuartz, it is revealed that the voice is actually a Patamon who is being pursued by Airu.