Long before the present, inhabitants of planet Campbell resolved to depart their world and search for fresh habitats. A faction commanded by scientist Oreana touched down on Earth yet their expedition was postponed. By the dawn of the 21st century, Oreana's crew revived and launched a scheme to seize Earth for their own. The sole viable countermeasure to the Campbellians" colossal biomechanical slave monsters is the super‑electromagnetic mecha, Combattler V, piloted by a team.