A message in a bottle turns a seaside holiday into a worldwide campaign to save the ocean. Join six friends as they meet the doplhins... and discover what's really going on under the sea.
The sea creatures are having a rough ride at the moment, navigating plastic litter, chemical spills, warming oceans and fishing supertrawlers. They share their predicament with some sparky, beach-loving kids - and together they make an exciting plan to save the world's seas and oceans.