The Centaurs are a racing team of 93 bikers from the port city of Yokohama who are named after the legendary Greek horse/men. Arthur and Ken fall out over their love for the same lady deciding to settle their competition with a race.
Mader is trying to unify the land of Asato using giant robots. A legend says that a champion, the giant of Iron, will come to destroy all lesser armour. Mader's ambitious son Hai tries to kill him and his other children, Hai's own brother Jordy and little sister Chururu, wanting no question as to the succession.
Five young superhero ninja employed by the International Science Organization oppose an international terrorist organization of technologically advanced villains who are trying to control Earth's natural resources.
