In the distant past, the inhabitants of Campbell planet embarked on a journey to find new habitable worlds. When a faction led by the scientist Oreana arrived on Earth, they faced unexpected setbacks, halting their mission. Fast forward to the early 21st century, Oreana's group awakens and launches a scheme to dominate Earth. To counter the formidable threat posed by the Campbellians and their massive biomechanical creatures, the only hope lies in the super-electromagnetic robot, Combattler V, and its skilled pilots.