With the advent of the Shizuma Drive, humanity embarks upon its third energy revolution, pledging an era of prosperity. Yet, the sinister Big Fire syndicate aims to dominate the globe, jeopardizing world peace. To thwart their nefarious intentions, the International Police solicit the assistance of Daisaku Kusama, possessing command over the mighty Giant Robo - an enormous android engineered to battle Big Fire's forces.