An aging nymphomaniac (Beryl Reid) and her closeted gay brother (Harry Andrews) both become enamored with Sloane (Peter McEnery), a handsome young man with a shady past. When Sloane kills their father (Alan Webb), the siblings overlook his offense and blackmail him into satisfying their outlandish desires. Based upon a play by Joe Orton, this black comedy maintains a gleeful tone while exploring homicide, sadism and homosexuality.