In a quest to restore harmony across the galaxies, the colossal robot Daikengo voyages through space. Onboard is Prince Ryger, a fugitive from the planet Emperius, determined to vanquish threats beyond his realm to safeguard his people. Assisting him is Cleo, the daughter of a corrupted prime minister, alongside two endearing robotic companions, Anike and Otoke. Their adversaries include the sinister Lady Baracross, commander of invading forces, and her aide Roboleon, sporting a distinctive Napoleon-esque hat. Daikengo, distinguished by unique features like scuttles concealing vampire-like fangs capable of spitting fire, becomes the beacon of hope in their battle for peace.