After finding buried treasure guarded by giant sand crabs and the crew of the Sea Rat comes down with a mysterious illness, the pirate students suspect that the treasure is cursed.
While spending a week on the Bone Rattler, a ship that is not exactly ship-shape, the pirates-in-training get stuck in Shipwreck Pass and must come up with a creative plan to save the Bone Rattler and find the treasure Captain Stinky beard seeks.