The Case of the Bloody Iris

Having recently escaped the clutches of a hippie sex cult, a beautiful model is pursued by a serial killer whose previous victims include former occupants of her new apartment.
A high-rise apartment populated by models, nightclub dancers and call girls becomes the focus of a mysterious serial killer. When a young model named Jennifer and her friend Marilyn move into one of the victims' former apartments, Jennifer becomes the next target and the pair try to identify the killer.