The Demon Clan who lives in the Underworld underneath the earth has started thier invasion on the earth. Zabitan, who had a demon father and a human mother, deserts the Demon Clan. Gabra and Ibiru also join him and together they form “Akumaizer 3!” They ride a ship, Zaiderberk, that can fly through the sky, and throw themselves into battle with the Demon Clan to protect various people.