Sandy Johnson and her brother Tim, vacationing on Mackinac Island, get swallowed by an old tree and must find the mysterious Stone Key to free themselves and others trapped on the Isle of Mayhem.
In 1818 Mary O'Shea must decide whether to remain on Michilmackinac Island and marry her dear Indian friend White Hawk or to accept the proposal of James, an English nobleman, and to go with him to London.
