Ponyo, the daughter of Poseidon, escaped from the deep sea to play, but was trapped in a glass bottle and washed up on the shore. She happened to be rescued by Zongsuke, who lived on the cliff on the shore, and the two met. But Ponyo's father, the magician Fujimoto, thought the human world was dirty and ugly, so he forcibly took Ponyo back to the sea. Faced with his father's obstruction and the sea sweeping the town...