Rushe DeMon, a super demon, comes to Earth from outer space and takes possession of Seigetsu Kanna, Chairman of a satellite network TV station. Now, DeMon is free to use Seigetsu's information network to look for 12 zodiac orbs. If DeMon acquires the orbs, he can control God Reideen and destroy Earth! Five boys are chosen to thwart DeMon’s megalomaniac plans. Hishou Washizaki, Ace Haneda, Ikazuchi Takagi, Ginga Torikai and Hayate Otori change into five Reideen soldiers to fight DeMon.