A friendly game of pirates becomes all too real when overzealous Theodore accidentally falls into a giant sinkhole and wakes up to find himself amongst real high sea swashbucklers. Before getting back to the real world, he is forced on an epic journey with his companion Harriet the Ghost in a quest to find the notorious pirate Weird Beard and foil the mutinous Mr. Clunky Bones. Will Theodore be able to save Captain Cramp Hand's ship from falling into evil clutches and return to his friends in time for ice cream?