As Earth teeters on the brink of invasion by aliens from planet Zeraz fleeing a consuming Black Hole, the valiant Professor Hi-Tech takes action. Constructing the colossal Space Dragon, Daiku Maryuu, with Pete at the helm, and the formidable robot Gaiking, with ex-baseball prodigy Sanshiro Shiwobuki in control, they stand as humanity's last line of defense. Daiku Maryuu, a dragon-shaped spacecraft housing Gaiking's core, unleashes Gaiking's modular components in battle, merging to form an indomitable force. Witness the epic clash between the Daikuu Maryuu crew and the Super Mecha Gaiking against the ruthless Zela aliens, driven by desperation from their doomed world. This saga unfolds on a global scale, with Gaiking piloted by Sanshiro Tsuwabuki, known as Aries Astonopolis in the English adaptation, alongside the awe-inspiring Great Space Dragon carrier. Gaiking's unique setting beyond Japan and the innovative mobile carrier mark this series as a trailblazer in the realm of super robot adventures.