The psychiatric Julio Degrás is invited by his old friend Captain Salanueva to help him in a murder case with five victims. Salanueva explains that apparently a young man named Ricardo had killed the victims in a bloodshed and committed suicide later; his girlfriend Lidia was found in shock on the road after a car accident and might have witnessed the murderers and help to solve the case. Julio reads Ricardo's diary and finds that he traveled to the village of Senilla with Lidia to an old house that belonged to his family, the Forqué, and discovered that the spot is a coven of the Chornets family that had annihilated his family in the past. Now Ricardo must kill the survivors of the Chomets to fulfill an ancient curse.