Zabu, the young orca, is separated from his family by a huge drift-net. On his adventurous journey back to his fellow orcas he has to survive exciting adventures. He meets various types of whales unfamiliar to him so far. Zabu befriends Piet, the pot whale, he saves the life of a humpback whale baby and tries hard to keep up with a dolphin in a swimming contest. Only the advice of the belugas gets him closer to the end of his journey.