In the space-time rift intertwined by parallel universes, there exists a mysterious dimension called the "Star Field of Light". This place was made up of the light energy of all previous Ultramans, but it gradually collapsed due to the phenomenon of cosmic erosion. Ultraman Tiga's light particles accidentally traveled to the earth in 2025, merged with the consciousness of the human boy Dagu, and embarked on a cross-dimensional mission.
