Mrs. Bantry wakes from a dream to find her housemaid Mary hysterically saying there is a body in the library. Though skeptical, Colonel Bantry goes to investigate and finds it is true - the body of an unknown young blonde woman has been discovered strangled in the library. Mrs. Bantry calls on her friend Miss Marple for help, believing Miss Marple's expertise in murder mysteries could help solve this real-life crime. Miss Marple goes to the Bantry home and sees the bizarre sight of the gaudily dressed dead woman lying incongruously in the Bantry's traditional, comfortable library.