The Earth had become a wasteland of deserts as the survivors work to rebuild communities. Daigo Otaki is a young orphan raised by his uncle. Becoming an adult, Daigo discovers that Victor City was in fact planned by his father who was a genius scientist. Daigo's sister Saori had been managing it. She pleaded with Daigo to take on the inheritance that Daigo's father left him, a super robot system known as Gordian. Daigo would join the Mechacon mechanic combat 18th regiment unit, an organization o...