Mia and her mum are enjoying a break at the seaside. Until... ...a creature emerges from the waves. It's a giant. A blue giant. It has a stirring plea to help clean up the ocean and save the sea creatures from the menace of plastic waste. Mia and her mum agree to help. But they can't do it alone... can they? Introduces the issues of pollution, waste management and the oceans, with suggestions of lifestyle changes to help the world become a better, cleaner place.