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.

In a mental asylum, Julián, wrapped in a straitjacket, tells us the reason for his madness... Killing his best friend seemed like a very easy task.