Cut-throat Jake and his ugly crew are busy celebrating on Cactus Island, surrounded by their stolen treasure. So they are caught off guard when Captain Pugwash and his men arrive disguised as a sea monster. But more surprises are to follow for all the pirates - when the real sea monster turns up to investigate, and Pugwash's crew are stranded by high tide. Luckily quick-thinking Tom the Cabin-boy is on hand to save the day again!