Little Dolphin and his friends in Urchin Bay always have fun and adventures together, in their underwater world. Little Dolphin, Poppy and Milo are taking part as a team in the Great Underwater Race! They're busy practising their relay changeovers near the caves when they hear Vinnie the shark planning to cheat in the competition! Their friend Fergal the sea turtle has an idea to stop Vinnie - if only Fergal can overcome his shyness and be brave ...