One day, robot Robby enters into a life of the most creative little boy, Toby. Robby had been separated from his robot parents when his spaceship crashed. Toby decides to offer his help and the two of them become friends.

Kyoko, a young Japanese girl training to become a professional mermaid, is saved by her coach's mouth-to-mouth "kiss of life". Desire awakens within her, she finds her mermaid voice and discovers the devastating effects of her singing, which will lead her to face the other side of the world.