The dolphin boy's heroic exploits have made him a legend among the sea creatures and islanders, but despite his fame, he feels lonely, because everyone around him expects only new accomplishments from him, and he has almost no real friends. In addition, he still does not know the story of his origin, even his real name is a mystery to the boy. The sudden appearance of huge whales and vicious crabs in the sea instills fear in the hearts of the islanders and sea creatures. Fate throws the dolphin boy a new challenge, but with it comes hope.