Molly Andersen's summer job in Wisconsin's Door Country originally sounded like two months of fun and relaxation, but she is soon caught up in an unusual flurry of activity involving a film crew on Rock Island, a professor and his crew searching for the wreck of La Salle's Griffin off the north end of the peninsula, and two mysterious men who seem to like to dig holes on Rock Island.

At first, the interactions between all these people and activities seems interesting and harmless. However, there are strong personalities, substantial investments, and hidden motives involved, and what begins as minor disagreements suddenly turns deadly serious. In the end, kidnapping and even murder may be involved....