In an inaccessible place between the mountains and isolated from the world, a school is located next to an old monastery. The students are rebellious and problematic young people who live under the strict and severe discipline imposed by the center to reintegrate them into society. The surrounding forest is home to ancient legends, threats that are still valid and that will immerse them in terrifying adventures.

After the strange behavior displayed by teenager Laura Villegas, her parents calls a Vatican-sanctioned exorcist to intervene in the case of demonic possession. From then on, a series of strange phenomena will disturb the family.