Astro Boy is a science fiction series set in a futuristic world where robots co-exist with humans. Astro is a powerful robot created by the head of the Ministry of Science to replace his son, who died in a car accident. Astro is shown fighting crime, evil, and injustice. Most of his enemies were robot-hating humans, robots gone berserk, or alien invaders. Almost every story included a battle involving Astro and other robots.