Do Bae-man became military prosecutor only to make more money and be successful. On the other hand, Cha Woo-in, recently joining Bae-man’s team, became one for her revenge. As these two different purposes shows, the two have very different backgrounds and personalities. However, as they work on the same case, Bae-man and Woo-on help each other and even grow together as fine military prosecutors.
Bae-man and Woo-in get ready for the trial regarding the shooting spree at GOP. They focus on revealing whether there was hazing involved with the shooter. However, those who are responsible for the abuse play innocent as if they had nothing to do with it. Meanwhile, Yong Moon-goo seals the deal with IM Defence in order to retrieve the X-File, and at the same time, Hwa-young requests that Tae-nam give a false statement.
Woo-in’s words are not convincing enough to persuade Bae-man to risk everything to help her. However, Woo-in realizes that he will eventually return to her. Meanwhile, Woo-in prepares for a military court case regarding No Tae-nam. The two seem to have gone their separate ways, but a scuffle with No Hwa-young brings back Bae-man’s forgotten memory from his tragic accident.
Do Bae-man returns to the army as a military prosecutor, and this time, he has a motive to stay. Not only that, he swears that he will assist Woo-in in carrying out her revenge. But to Woo-in’s eyes, Bae-man seems to be hiding something. As expected, Bae-man gets caught having a secret meeting with Yong Moon-goo. Either way, they need to chase down Tae-nam who has fled the army.
Justice is closing in on Won Ki-choon as people related to the case come forward with the truth. Bae-man also pressures Ki-choon to do the right thing and stand against No Hwa-young. Eventually, Ki-choon meets face-to-face with Hwa-young and requests the proper treatment that he deserves. Meanwhile, Hwa-young tries to deal with the risky situation in her usual way.
Bae-man and Woo-in figure out the details regarding Commanding General Hong’s abuse of power right before the trial. Although they make their utmost effort to prove Shin’s innocence, it is hardly likely that the trial will proceed with fairness. Meanwhile, Woo-in gets a phone call from an unexpected caller.
With the help of Tae-nam’s testimony, the prosecutors regain the upper hand. On top of that, Bae-man and Woo-in now see the situation as a chance to wipe out Patriotic Society once and for all. Meanwhile, Moon-goo’s plans to become IM’s owner fail when an unwelcome guest shows himself at the shareholders’ meeting.
The court’s ruling favoured Bae-man and Woo-in, and it’s inevitable that there will be internal conflicts within the Patriotic Society. As expected by Bae-man, he is contacted by Hong Moo-sup and retrieves crucial information that will possibly tear down the Patriotic Society. Meanwhile, for some reason, Woo-in can no longer reach Kang Ha-jun, and at the same time, a horrifying event takes place at GOP 14.
Bae-man and Woo-in manage to arrest Tae-nam who was on the run, and his arrest signals the beginning of their revenge. Their first target is Won Ki-choon. Bae-man believes that Ki-choon is not someone who others believe him to be. With reporters watching, Bae-man chooses to take a risky maneuver in proving his point. However, it is too late when he realizes his mistake.
The sound of battle has now faded away, and the military prosecutors and Tae-nam are brought to the emergency room. Only time will tell whether they will survive the critical condition. Meanwhile, Moon-goo makes a last-ditch effort to escape conviction. Bae-man and Woo-in also prepare for the last battle of the war.
Bae-man and Woo-in are called to a disciplinary hearing after publicly making a huge mistake. However, they still believe that there is a need for the investigation to continue. As they continue with the investigation in their own ways, the true identity of the so-called Mine Hero disgusts both Bae-man and Woo-in.
Bae-man finally confronts Hwa-young face-to-face, and at the same time, Woo-in greets Moon-goo at one of the IM’s offices. With their plans on the verge of being exposed, the two start gearing up for their next move. Meanwhile, to make up for his mistake, Bae-man tries to maintain the right to investigate the bullying case. However, Hwa-young already has her plans to manipulate the court.
Bae-man discovers a new lead that connects Woo-in to Allen’s abduction. While doing so, he gets an opportunity to work under Chairman No Tae-nam, but the opportunity comes at a heavy cost. Bae-man believes that his days after the discharge are set, but everything suddenly starts to fall apart.
After the shocking death of Won Ki-choon, Bae-man and Woo-in turn to the next best option and go through crucial evidence that Ki-choon has been keeping. Bae-man believes that there is something fishy going on at Hong Moo-sup’s official residence and sets him as his next target. However, Woo-in is not on board with the idea of an aggressive investigation and tells Bae-man to back off.
Woo-in doesn’t hesitate to show Bae-man who she really is, and Bae-man finds it difficult to get a grasp of the situation. With only a few days remaining until discharge, Bae-man struggles to figure out where everything started to go wrong. Meanwhile, for her own sake, Hwa-young instructs Moon-goo to enlist Tae-nam in the army and takes her son under her wing.
Knowing that things could get ugly if people find out about Allen’s disappearance, No Tae-nam suggests to Yong Moon-goo that he bring in Bae-man for the dirty job. While tracking down Allen, Bae-man realizes that his chore has something to do with Tae-nam and also that a girl with red hair could be responsible for the disappearance.
Bae-man’s agreed term of five years as a military prosecutor is about to end, and that’s when Cha Woo-in joins the department as the new military prosecutor. She acts and speaks differently from other ordinary newcomers, and Bae-man right away senses that she’s hiding something. Bae-man makes sure that she stays quiet until he’s discharged, but Woo-in doesn’t seem to care.