Mike Strauber catches his wife Sharon in bed with his best friend Jerry. He gets mad and takes off to embark on an adventure of murder and self-mutilation in demented games of truth or dare.

A friend of Miss Marple's sees a woman being strangled in a passing train. When police cannot find a body and doubt the story, Miss Marple enlists professional housekeeper, Lucy Eyelesbarrow, to go undercover.