Toby, the son of Dr. Tenma, who worked in the Ministry of Science and Technology, was killed in a car accident. Tenma lost his beloved son, he tried to create a robot in the likeness of his son's life - Astro. And gave it extraordinary skills: 100,000 horsepower and seven types of weapons, and brought back to the province of science. Later on the tanker, Astro was tricked by the circus master; but the circus mistreated the robot, and he was ransomed by Dr. Cha Shui, the governor of the Science Province, and named "Astro". In his later life, he will sometimes be discriminated against as a robot, but he has always wanted to build a friendly bridge between humans and robots, and to do battle with the forces of evil.