The protagonist transmigrates into a universe from a period before Noa had appeared, becoming a particle of light destined to drift through space alone. As he travels the universe, he absorbs the particles of light emitted by every Ultraman who fought during the era from Noa to Ginga. After a long passage of time, Ginga pursues Lugiel and is swept through time and space, bringing him to the world of Nexus. There, he grows into an Ultraman: Ginga Seth Ultraman, a powerful warrior who can transform into any Ultraman!
