The three brothers, Ken'ichi, Dajiro, and Hiyoshi Go join with Ippei Mine and Megumi Oka to pilot the giant robot Voltes V to battle planet Boazan's people in their effort to conquer the Earth to insure their galactic domination. One of the most notable designs in the series is the Boazan flagship shaped as a gigantic horned cranium with a fairy tale castle on top of it. As for Voltes V, it looks a lot like a toned down Combattler V and even shares the same five components design. Despite that, the feel of the series and character background are quite different from Combattler V, with a lot more maturity and psychological development.