The son of a sailor, 5-yr vintage Sosuke lives a quiet existence on an oceanside cliff with his mom Lisa. One fateful day, he unearths a lovely goldfish trapped in a bottle on the seashore and upon rescuing her, names her Ponyo. But she is not any normal goldfish. The daughter of a masterful wizard and a sea goddess, Ponyo uses her father's magic to convert herself right into a young lady and quick falls in love with Sosuke, but the use of such powerful sorcery reasons a risky imbalance within the world. As the moon regularly attracts nearer to the earth and Ponyo's father sends the ocean's powerful waves to discover his daughter, the two children embark on an adventure of a life-time to shop the world and satisfy Ponyo's goals of turning into human.