Jack, Zack, and Caspar are building a ship—on the beach, out of sand. When they set sail on their imaginary adventure, Jack spies an enemy pirate ship nearby. They chase after the pirates, but a storm wrecks their ship and sweeps them up on a desert island. The island isn't totally deserted, though—their pirate enemies are there too. Just as the boys discover the pirates' treasure (an array of delicious desserts), the pirates (their parents) capture them. But these pirates are friendly—they're willing to share the treasure, and they throw in some ice cream just for good measure!