Winston Breen and his friends Mal and Jake accompany Mr. Penrose for a weekend of puzzles and games at the mansion of a famous musician. Over the course of the weekend, some guests' prizes and belongings inexplicably disappear. As the group continues with the elaborate puzzles-which the reader is invited to solve too-some of the guests try to figure out who is stealing things, and others become suspects. But in the end it's Winston who stumbles upon...