One day, Kangaroo follows a trail of bubbles that lead her to - Koala! But Koala is shy, and doesn't seem interested when Kangaroo tries to play. But after a while, Koala blows happy bubbles Kangaroo's way, and their friendship begins. Together, Kangaroo and Koala blow big bubbles and small bubbles, and animal-shaped bubbles too! But when a bunch of bubbles clump into a giant monster that is heading for Kangaroo, it's up to shy Koala to be brave enough to help his friend.