For many ages three powerful but secretive organizations have operated on Earth: WIZ-DOM, Arayashiki, and Darklore. During the Age of Aquarius the alien Erasers invade, sparking a fourth organization—E.G.O.—to arise and unite the other three in defeating their common foe. Peace lasts for only a short time, however, before the interdimensional Polestar Empire invades on a mission of conquest. Once again representatives of each of the four organizations must gather and come up with a way to defeat the new invaders.