First, a grocery store robbery occurs. Then, somebody steals Bill Collins's prize watermelon. There's thievery going on near Sugar Creek! And Bill is sure that the Till boys have something to do with it! Poetry and Bill start collecting clues. They find a map of Sugar Creek territory hidden in a floating watermelon and encounter strange happenings in the middle of the night. Join the Sugar Creek Gang as they learn not to jump to conclusions, for some things are not as they appear.