When a young boy called Ben and his dog, Ted, discover Bluey the Shark washed up on the beach, they start on a magical journey which leads them to uncover the truth about the huge impact humans are having on the oceans. Encountering a blue whale who reveals a worrying trend of disappearing fish, a crab who is forced to use a plastic bottle for a shell and a giant squid, who implores Ben to spread the word about the threat they are under, the only question is whether time is running out for Ben, Ted and Bluey to save the oceans...