Theme Planet is a gigantic leisure park, built by a crazy, old scientist living inside the secret core of the planet. Theme Planet consists of roller coasters and attractions which have been constructed in the course of time in countless levels on top of each other. Among thousands of others in this park also a small pig and its buddy Elephant work as maintenance staff. One day, their quiet life is heavily disturbed when all of a sudden, huge metal-eating robot worms emerge from the underground, devouring entire roller coasters, including Pig's  and Elephant´s habitual workplace. The  desperate residents persuade them to travel to the mythical planet core to stop the metal-eaters before they destroy Theme Planet. On their fast-paced adventurous mission to restore peace and happiness, they discover the secrets of Theme Planet and go through numerous surprising story twists until they finally manage to save the whole planet.