A man in a cloak slipped into a special psychiatric clinic and killed one of the female patients. At the same time, various sexual relations have also been exposed. The mysterious killer continued his massacre: he cut off a nurse with a sickle, pushed a driver onto a "Iron Lady" with a thorn, strangled an elderly female patient, killed a lesbian with an axe, and shot a lesbian in the neck with a crossbow. Dr. Clay and the police set a trap for the killer by using a charming female patient as bait. However, they are not ready for the next challenge