Decades ago, a being known as the Giant of Light joined together with Shin Hayata of the Science Special Search Party to save Earth from an invasion of terrifying monsters called Kaiju. Now, many years later, those dark days are fading into memory, and the world is at peace. But in the shadows a new threat is growing, a danger that can only be faced by a new kind of hero--a new kind of Ultraman...

After all that has come to light, Shinjiro now struggles with one question--is Ultraman good or evil? While he ponders this, Rena also comes to him with another revelation. Meanwhile, an alien hunting party has arrived on Earth bent on killing humans for sport. The police and the SSSP, along with another mysterious organization, begin to investigate...