Mata Nui (Michael Dorn), the Great Spirit of the Matoran universe on Aqua Magna, has been exiled from his home by his "brother," the evil Makuta Teridax. Teridax took over his gigantic robot body just after Mata Nui's reawakening and trapped the latter's spirit inside the legendary Kanohi Mask of Life. Teridax then banished the mask into orbit, in order to prevent Mata Nui from interfering with his takeover of the Matoran Universe.