Alibis: Peter Kennedy's 1940's whodunit drawing room murder mystery takes place at Seven Oaks, a mansion in the English countryside belonging to actress Prima Vera Donna. When she turns up dead, it is up to the guests of the party to solve the mystery before they, too, are at risk: stuffy butler Justin, social butterfly Hope Leslie Trite, playboy Sandy Lynxe, dotty chemist Dr. Jacqueline Hyde, aristocratic Sir Tanley A. Fraud and mute nun Sister Bella Donna