Long ago, on a world known as The Ultra Star in the M78 Nebula, hundreds of millions of light years away from the Milky Way, dark forces were rampaging through the universe, and the Ultras were caught up in the vortex of war. At a time when the Space Patrol had not yet been formed, planets were being destroyed and conquered one after another, and the destruction of the Ultra Nation was imminent. Ultra Star's King decides to take a last stand and calls forth the four strongest warriors of the Ultra race, Ultraman, Ultraseven, Shin Ultraman, and Ultraman Ace, who are scattered throughout the universe. Together with their King and Zoffy, the six of them must fight the final battle!