Synopsis: Paul Naschy stars as a mercenary who double-crosses his partner/girlfriend Meiko and gets shot for his troubles. Failing unconscious, he is taken in by a wealthy doctor who has two beautiful daughters. His recuperation is slow, and in the meantime he is seduced by daughters and apparently haunted by the ghost of their mother. Strange things are going on at the house and if he is going on at the house and if he is going to survive the night, he'll have to escape the house.