Daikengo, a powerful robot, travels through space with prince Ryger on board, who seeks to defeat Lady Baracross and her forces that are threatening his home planet of Emperius. Ryger is joined by Cleo, the daughter of the corrupted prime minister, and her robotic companions Anike and Otoke, as well as Daikengo's unique abilities, including his scuttles on his mouth which allow him to spit fire. Lady Baracross, who is aided by her assistant Roboleon, is the primary antagonist.