Dead Chest Island

Sitting beside a smokey fire, Edison and his new friend Jonathan hear a curious tale of pirates and a cabin boy who is swept into an underwater tunnel on Dead Chest Island. Is the tunnel really there and where does it lead? Edison and Jonathan concoct a crazy scheme to borrow a boat and search for the tunnel.
Edison's loudmouth sister is a vexing last-minute participant in the quest. They set off on a sunny Caribbean afternoon, planning to return in time for supper. But the motor sputters ...