Alice, a private investigator, disguises herself as a paranoid patient and enters a mental hospital to collect evidence about a mysterious death of an insider. However, what she encounters during her "recuperation" in the hospital is beyond her imagination, and her reason tells her that there must be something behind all this. A completely strange and passionate story is about to unfold before her. This movie is adapted from the novel of the same name by Torcuato Luca de Tena.