30 million years prior, a giant of light sealed the darkness and went into slumber in the red star. In the present day, GUTS-Select team was formed while Martian settlement Kengo Manaka lived his life as a botanist. Unfortunately his peaceful life was disturbed by a monster attack at the same time when the sealed darkness started to move. Kengo has a fated encounter the giant of light from the past, whose name is revealed to be Ultraman Trigger.