Professor Lexie Driscoll is conducting the first meeting of the Golden Age of Mystery Book Club in her best friend's swanky mansion when a friend is murdered. More members are knocked off as Lexie unravels secret after secret, leading her to believe she's living in Christie's novel, "And Then There Were None." Using Miss Marple's knowledge of human nature and Hercule Poirot's cunning, Lexie must save her club and reveal the killer.