The original form of the universe, the "primordial darkness", has awakened, and it wants to return the universe to nothingness and return it to its original appearance. After learning the news, the Ultra King went to stop the original darkness, but was infected by it and invaded the Kingdom of Light with the monster army. Although the Ultra Warriors fought hard, the Kingdom of Light still suffered disaster.
If this continues, not only the Kingdom of Light, but the entire universe will disappear. In order to save the entire universe, Zero traveled through time and space and returned to the beginning of the universe...
Back in the present, an uninvited guest arrives on Mars—the God of the Kyriarodians! It wreaked havoc on everything here, and threatened Dagu's family, forcing Dagu to become the Giant of Light again - Ultraman Tiga to defeat it.
But the claws of the original darkness have also disappeared. Can the giant of light that appears again stop the coming of darkness...
