Madrid, 1990s. After making a Ouija with friends, a teenager is besieged by dangerous supernatural presences that threaten to harm her whole family. Inspired by terrifying police files never solved.

Hugo Vartan is an author looking for a juicy story for his next book. He comes across one in the form of the sister of his flatmate’s boyfriend, who has been hospitalised in a psychiatric ward for, seemingly, murdering her partner, beheading him with a knife and sticking his head on the steering wheel of her car.