A terrifying, grotesque figure bursts into a young art student's room. Head covered with a clown's wig, face concealed by a smiling mask, it wears the rubber gloves of a surgeon. The girl is seized, chloroformed, suffocated and - horrifyingly - beheaded. This is only the beginning of a series of murders terrorising London's fashionable Bohemia. The police target three avant-garde filmmakers. One of them is mocking the other two, and openly taunting the police as well. But which of them is behind these appalling crimes?