There are important rules that must be obeyed. Don't talk back, Don't leave the grounds, have fun! For a group of girls kept in a house following the rules can mean life or death in this Spanish horror film.

A documentary maker, a team of researchers in dead languages ​​and rites, a priest and a cameraman enter a factory that has been abandoned since 2001, when an employee murdered 16 work colleagues and subsequently, in the face of police persecution, killed himself. The police concealed evidence and closed the case as mass murder, but several testimonies, forensic photographs and other studies showed that the killer had practiced Enochian magic.

When a man and a woman stay at the hotel, the ultra-religious Remedios begins to act stranger than usual, while her children begin trying to contact their deceased father using a strange book they found in the basement.