Beloved dowager detective Miss Marple (Joan Hickson) unravels one of mystery writer Agatha Christie's most popular brainteasers. Miss Marple's case begins when a pleasant country morning is marred by the discovery of a corpse in the home of Col. and Mrs. Bantry. When suspicion falls on the colonel, astute octogenarian Miss Marple sets out to prove his innocence, and she traces the girl's orgins to a seaside village.