Little Blue is an intrepid little character who lives in an upturned boat with his mum and dad off the coast of Southern Australia. His friends are Rocky, a baby rockhopper penguin with a bright yellow crest, and Joey, a little kangaroo. His enemies are Fick and Fin the wisecracking sharks, and Big Grey and his gang of burly kangaroos.

Little Blue only wants to play with his ball. But the rain just won't stop and he's not allowed to play inside. Can his friends, Rocky and Joey, come up with a plan?