Adéle blames Amaia for the party and she’s accused of tattling. Paul and Amaia take Paz and Eric to see a mysterious painting with crow-men, but they find something terrifying instead. Inés undergoes treatment and takes pills that give her hallucinations. Elías and Elvira feel an increasingly irresistible attraction and Paul and Amaia will discover something about Las Cumbres.

The Las Cumbres prior believes the devil runs rampant in the monastery. Amaia discovers a supernatural tie between her and Inés. Elías feels extremely guilty after what happened with Elvira. Meanwhile, Paul finds something in his cell that makes him suspect the friar. Eric suffers a strange blackout and Paul and Amaia follow a clue to find the Crow’s Nest.

Amaia and Paul manage to find the Crow’s Nest. Meanwhile, Inés wakes up confused in the middle of the woods and when she sees León, she runs in terror. We go back in time to discover the secret behind Inés’ connection to León. Eric suffers another episode of memory loss. Elías notices some strange behaviors, which start to raise his suspicions.

One student dead, another student missing, and the kids get framed when the headmaster's search turns up ecstasy among their possessions.

The friends mourn Manuel. The prior discovers Elías has broken his vow of chastity and sends him to another monastery. Meanwhile, Elvira tries to share everything she knows and Inés starts putting pieces about her past together. But a new and unexpected death enrages the students, who start a rebellion at the school. Everything is out of control and we’re in for an unexpected ending.