A cloaked figure slips into an exclusive psychiatric clinic and murders one of the female patients Meanwhile, various sexuals liaisons are revealed The mystery killer continues with his massacre: he beheads a nurse with a scythe, pushes a chauffeur into a spiked Iron Maiden”, strangles an older female patient, kills a nymphomaniac with an axe, and shoots a lesbian through the neck with a crossbow Doctor Clay and the police set a trap for the killer using one of the attractive female patients as bait However, they are not prepared for the onslaugth that follows…