The Gummi bears help their friend Cavin who is in trouble. They make a plan using Zummi's magic which works but Gruffi becomes invisible and is caught by an ogre. Cavin drinks Gummi berry juice which makes him strong enough to lift the ogre. Duke Iggy then steals and drinks the juice, becoming strong too. The Gummis try to stop Iggy's catapult from launching as it moves but Cavin is stuck on it. It crashes but Cavin survives, and the King and Princess thank the Gummis for saving the day.