Two detectives are hired to discover if a rich industrialist is having an affair. The detectives pose as a gay butler and as a female cook in order to spy on all of the happenings within the house.

Patrick Davenant invites a group of friends to visit a theater inside his villa, a place which later reveals itself as sinister. Within a short time, the guests realize that they are trapped in the villa. A merciless killer then begins to murder them one by one.BY:

Gothic and erotic mystery about a young man called Marco, who goes to stay with his strange uncle, whose wife (Marco's beautiful aunt) died some time ago. His uncle's sister-in-law is the only other person living there. Marco spies on rituals of self-gratification performed every night by a red-headed woman who looks just like his dead aunt! Marco begins to wonder if the woman is actually the sister-in-law made up to look like her dead sister, or the dead aunt haunting the place...
—ajji-2

1979 film by Joe D'Amato

1976 film by Tinto Brass