Sunny Stream was once a beautiful, crystal clear stream that ran through the heart of Bugworld. But now it's a murky, smelly place and the creatures that live near it are becoming very sick. Who is responsible for this foul dilemma? Join Wormie Wormald, the smartest worm in Bugworld, and his two best friends, Lily Ladybug and Bertie Beetle, as they hatch a plan and set off on a fantastic adventure to save their beloved stream.