When the bully Bryce Billings bets Fish Finelli that he can't find Captain Kidd's legendary long-lost treasure, Fish and his friends (and little sister, Feenie) must embark on a quest to find real-life pirate treasure. Between sneaking into the library to track down Captain Kidd's treasure map, stowing away on a boat, and trespassing on an island, Fish and his friends certainly have their work cut out for them. But will Fish actually be able to find Captain Kidd's treasure and win the bet?