Ana, a nursing assistant, begins to feel attracted to Agustín, the husband of a woman in a coma whom she cares for. She then begins to be harassed by strange phenomena who want to throw her out of the house and separate her from Agustín.

After a miraculous childhood, Narcisa becomes a novice and starts teaching girls in a former convent haunted by a disturbing presence.

Sergio hasn't spoken since he murdered his parents six years ago. Now, a psychiatrist aims to uncover what happened through a twisted investigation.