Dolphin Snowball rescues a little boy in the waves who survived a plane crash. Together, they grow up as friends, exciting the marine life with their funny tricks. However, their joyful world is shattered when an evil Octopus destroys their peace. The boy is banished to land and must adapt to life among humans while uncovering the secret of his origin. With the help of Captain Murvarid and his loyal dolphin friend Snowball, the boy embarks on thrilling adventures in the depths of the sea and mysterious islands.

The heroic deeds of the dolphin boy made him a legend among the sea creatures and the inhabitants of the island, but despite his fame, he feels lonely, because everyone around him expects only new achievements 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 evil crabs in the sea strikes fear into the hearts of the islanders and sea creatures. Fate throws a new challenge to the dolphin boy, but at the same time gives him hope.