Twigs causes no end of trouble when he uses a magic pebble to grant his every wish. Worse still, a magic pebble in the hands of the Mushas could spell catastrophe for Treetopolis. Battling against a bizarre barrage - from a giant rolling cupcake to an epic slick of stinky slime flooding the castle streets - Tom has to step up to save the day. He needs Big World Magic help from the audience to succeed.