On the cruise ship, The robot Tobio fails to master his powers, and has caused a lot of damages such as breaking a tap and ripping away his father’s suit. As a result, Tenma forbids him to go to the dinner with him, but changes his mind at the request of a passenger who want to meet his son. However, when it is noted that Tobio is a robot, people all around the dining room are upset. Following another goof up by Tobio, Tenma expels him, refusing to acknowledge him as his son anymore and calls him a robot. While outside, Tobio is approached by a man called Hamegg who comforts him. A cruel, unforgiving ringmaster for a robot circus, he wants to use Tobio for basic backstage work and asks Astro to sign a contract. Astro, not knowing what the contract means, signs the contract and now he is a possession of Hamegg.