Dr. Elephant gives Astro a pretty girl robot, Uran, as a New Year’s gift. But she is too much for Astro to handle. She goes into town and causes a commotion. On top of that she is lured by a special sound wave from a clown’s flute and is captured by a robot smuggling ring, along with other child robots. But with Uran’s help, Astro finds the smugglers' artificial island and destroys it.