Carolina's disappearance freaks out her friends as different stories roll in about her sudden departure. They're sure of one thing - Jacques is behind it.
As the school prepares for its annual bonfire (where flames wait to accept wishes and purge bad memories), two teachers face death, one teacher faces expulsion, a student remains ostracized, and a prisoner escapes.
Christmas approaches and all but Marcos, Paula and Miguel pack for home. An unexpected snowstorm sets in, upsetting plans for some while revealing a hero and a traitor.
Don Joaquin's body is found. More details about Rebeca's past are shown. Paula and Evelyn try to win back Jacinta. Marcos and Carolina get into more trouble. Julia finds out who her ghost is. Ivan turns in his father.
Elsa's ignorance of Julia's home life could cost her her career as head mistress. Fermin's inability to hide a serious injury could cost him his life.
Ruben's sudden tirade goads student unrest towards insurrection, turning all but Marcos towards ideas of escape. Meanwhile, Fermin and Rebeca seek to retrieve Max, and Elsa plans for the end.
Evelyn, mistaking Daniel's vial of the death virus as a cologne sample from Paris, intends to make it a gift for Lucas' birthday.
To prove they're not related and can be together, Iván's cousin, Manuela Portillo, sends him an unexpected item - his own death certificate.
Two days till the end of term and escape from the boarding school horrors, but with an unnamed student scheduled for death, Marcos' group wonders who it might be.
With police on hand to investigate the whereabouts of a missing person, existence of the gnome becomes public. Will the lesson of judging a book by its cover intercede before tragedy strikes?
Seeking to distance himself and Paula from the menacing school, Marcos readies to sign Héctor off as their guardian, but two investigations lead him to an impasse with no one to trust.
As Marcos mourns the loss of Carolina, Rebeca recruits Maria into a dangerous plan, much against Fermin's wishes, and Martin encounters a familiar face he's never met.
Paula and Evelyn find a bat and think it's Camilo. Marcos and his friends explore the lab in the passages. Hector and Jacinto piece together more of the Gemini Project.
Jacinta returns, but everyone's general happiness remains short-lived under Elsa's rule, and Marcos discovers a worrisome numerical connection between the dead orphans and his sister.
As knowledge is power, factions play a three-sided chess game (figuratively) for more. Evelyn, meanwhile, fears she's pregnant, while Carolina seeks the identity of the traitor.
Noiret continues to look for the papers missing from his safe. Lucas has another dream. Marcos realizes who the baby really is. Another student dies.
A note discovered at the abandoned playground of the old orphanage reveals the names of "The Five Avengers" plus a sixth who survived.
The school board offers Héctor's job to Elsa but only if she'll expel the students who were found with ecstasy among their possessions. She asks for one concession - that one can stay. Héctor objects.
Marcos, Lucas and Héctor consider sharing their best kept secrets (which would all be best if kept secret).
With only two factions aware, a countdown barrels toward the activation of lethal biological bombs loosed upon world society. Meanwhile, the kids find Hugo to be magical.
One student dead, another student missing, and the kids get framed when the headmaster's search turns up ecstasy among their possessions.
Tired of being too passive, Marcos and Iván make bold moves, which Paula and Evelyn unknowingly undermined when seeing nothing but constant lies and deceit in everyone older than themselves.
Marcos' secret relationship becomes less secret, Julia heeds Paula when she says that ghosts appear when they have something important to convey, and Mateo experiences horror.
With the virus loosed, soldiers cutting off the school, and a makeshift infirmary established to corral those infected, Evelyn decides to fake the illness to make Lucas jealous.
End of term. Summer vacation. Statements of farewell with hopes to leave forever, and others' plans to counter those plans. Many secrets finally revealed, and new developments arise.
Martin and Lucas are getting used to living in the boarding school. Fermin is looking for Irene's baby. Hector has decided to sell one of the diamonds he found in the cave. Lucas makes friends with Paula and Evelyn.
An accident where a student gets hurt puts teacher Amelia's future at the school in question. Paula and Evelyn believe they've uncovered the identity of the Tooth Fairy.
Marcos improves his standing among Ivan's group when he discovers a secret passage which, lyin' beyond the wardrobe of the mysteriously absent Alfonso, opens into a new world of questions.
Repeat visits from an owl convince Paula in the gnome's reincarnation, Iván can't believe he killed a man, Fermin fights for his life while losing the paintings, the gang discovers a second door, and Saúl preps a new operative.
With plumbing problems plaguing the school, Paula questions reality after repeatedly awakening inside a hospital. Marcos learns a horrifying fact about his parents' disappearance. Jacinta and Joaquin strike a deal.
Lieutenant Jimeno visits the school to investigate the death of Mateo Tabuenca, whose decaying corpse policemen found in the trunk of a teacher's car.
At the school's Feast of Saint Isabel, as Jacques continues to deprive Ivan of medication, Ivan, rather than give up Maria, aims literally to take his dad down during the festivities and expire together.
Appearing as Alice in a school production of Alice in Wonderland, Paula questions the condition of madness - perception or dysfunction - and believes Julia needs help.
Still quarantined with doom all around, the school moves quickly to transact a wedding.
As Saúl appears abruptly before Marcos to advise him towards identify the bodies in the morgue as his parents, Fermin discovers a treasure trove in the labyrinth, and Elsa cares for Baby Samuel in secret.
Martín hopes the incredible nature of Lucas's latest prophetic dream (where Camilo collides with a flying unicorn) will prove them all insubstantial. Meanwhile, Julia sets out for her father's safety deposit box alone.
As the school remains a hot focal point of multiple mysteries and intrigue, Iván signs the papers acknowledging Jacques as his father, almost immediately aware of its depths as a bad move.
As the kids try again to undermine the murder dream, the gang deciphers the last book clue, the school elects a new principal, Julia leaves for good with her step-father, and Fermín's search for his father's killer pays off.
A new year at the Black Lagoon Boarding School starts, one that will be full of unexpected twists and turns.
With the threat of death looming as he continues to pursue information about his missing mother, Marcos takes an extreme course of action to make a hospital connection that won't arouse suspicion.
With Lucia in need of emergency surgery, Martin hides infected Lucas in the secret loft, Evelyn seeks erotic passion, and the teens seek the scarred bald man of their dreams.
Eva's clue leads the teens to discover a sealed bedroom, Fermin fumes over Rebeca getting Maria more deeply involved in intrigue, and the kids hope to get Jacinta "laid."
An injured owl leads Paula to consider the value of being free, thereby risking death, against the safety and boredom of living in a cage - a lesson lived out by others at the boarding school.