It's midnight and a freezing rain falls on the Old Saunders House. The site of three gruesome massacres, the rambling dark mansion is now a mental hospital for some of the most violent patients in America. But something horrifying stalks the corridors at night terrifying both inmates and staff. It's a hideous looking clown who wants all the patients to resemble him. Before he finishes his diabolical torture, the patients have become living nightmares!