A scared horror writer is sent to what he believes is a sanatorium to treat him for his fears, but it turns out to be a haunted castle where he becomes embroiled in a rich family's internal battles for a coveted inheritance.

Julio César is a writer of horror radio soap operas, but since he himself is frightened by what he writes, to calm his nerves, psychiatrist Jiménez sends him to a sanatorium housed in a castle where they will help him so that nothing scares him anymore. In order not to expose himself, he chooses to go under the pseudonym Justiniano Conquián. But it turns out that someone else bears that name too: a distracted taxidermist about to receive a million-dollar inheritance that he will only get if he lives in the Coquián castle for a month; a place full of ghosts, and where other relatives who also covet the inheritance have gathered. Doctor Jiménez, as it turns out, has contacted and bribed by a cousin of Justiniano Conquián, to send Julio César to the haunted castle, assuring him that it is a sanatorium. There, a series of characters and situations make Julián believe that everything is part of the therapy, so he prefers to start having fun. The film stars Joaquín Pardavé, one of the most beloved figures in the history of Mexican cinema, a character actor who became a star of the town as a musician, composer, actor, director and comedian, until establishing himself as a one of the greatest legends of Mexican cinematographic history.—RagingR2