In the past, a devil’s splinters were scattered across space. Today, the splinters is still causing chaos throughout the universe. While the Ultra Heroes fight to restore peace to the galaxy, a mysterious being uses these items in its despicable schemes to destroy planets one by one. And now, that evil being approaches the “Land of Light.” In its way stands the gallant Ultraman Zero and his disciple, Ultraman Zett. At the end of a fierce battle, Zett chases a monster alone, making his way towards Earth… Meanwhile on Earth, a defense force to combat routine monster appearances, the anti-monster robot force STORAGE, is formed and joined by the hot-blooded youth Haruki Natsukawa. When a monster from space invades Earth, Zett and Haruki have their fateful encounter. Here begins the passionate story of our two young heroes’ battles!