When the Jenkins family arrives at their Straits of Mackinac summer cottage, 15-year-old Pete Jenkins, meets and befriends three other teens. But before long, in a summer already filled with fishing, learning to sail, and making new friends, the four teens stumble across evidence of a counterfeit money scheme, which they suspect is run by a recluse writer named Harold Geetings. Their investigation leads them to nearby Mackinac Island on which they discover an extensive Underworld operation, and where their curiosity endangers their lives when they witness the murder of one of the gang! Pete and his friends find the adventure of a lifetime in this exciting, suspenseful story for young adults set in beautiful islands of Les Cheneaux and on Mackinac Island in northern Michigan.