Callie Shaw invites Frank and Joe to Runner's Harbor, a hotel in Barbados run by her cousins. But just as the brothers arrive, they're met by a horrifying host. Then things get even scarier. From trap doors and secret passages to ghostly gunmen, the young detectives come face-to-face with the mysterious spirit world. It seems Runner's Harbor has a skeleton in every closet -- and they're all out to put the brother team into an early grave.