A murderer in a black cloak is stalking the patients of an all female sanitarium. (That’s right folks it doesn’t even take place in a hotel. As one character says, “It’s better than a hotel!”). A doctor (Klaus Kinski), a nymphomaniac (Rosabla Neri) and a lesbian nurse (Monica Strebel) are the red herrings. In the end, the police get a patient (Margaret Lee) to help catch the killer. The murderer uses an axe, knife, an iron maiden, a crossbow and a mace to kill his victims. There’s also plenty of female flesh on display, including two pretty graphic masturbation scenes. A solid sleaze thriller.