When Flinn first met the Pirate Dinosaurs, he thought that he had taught them a lesson. But the real lesson is this ? never trust a pirate, but never ever trust a pirate dinosaur. This time, Flinn is hot on the trail of some stolen treasure and he knows exactly who's to blame. With the help of his friends and Captain Gurgleguts, fearless Flinn tracks the rotten crew to the Lost Island.