The last time Larry had a funny felling that something strange was about to happen, he and Josh raced for millions of dollars of buried treasure - and their lives. Well, Larry's having that feeling again and sure enough, on a leisurely cruise around Peolle Island, the boys run into a mysterious old longboat that appears to be in perfect condition. On top of that, there's a man aboard speaking in an ancient foreign language andcarrying a pouch of documents. Soon, Larry and Josh are involved in finding a lost island and restoring a missing heir to the throne of a kingdom. Only somebody wants to stop them from doing it, and wants to stop tem badly enough to get rid of Larry and Josh forever!