In a futuristic Tokyo, a young man awakens to find himself with no memories of his past. Behind him, a mysterious young woman named Elea appears. Handing him a pair of red glasses, she asks him to save the world! Leaping from the top of the building, a device on the man's arm ensures a safe landing, but an explosion destroys the room above. Who is he, and just what is going on? A message sent to the device on his arm orders him to meet with an "Agent K" at Club Delphi. Meeting with K, he discovers his codename is "Jin", and that they are both members of an organization called DEUS, secretly eliminating aliens who threaten the Earth. Following the trail of an alien at the club, the two men are separated, and as Jin is lead inside a UFO, the aliens unleash the giant monster Galkimes upon the city, After Jin is captured by the aliens inside, the mysterious Elea appears once again. Now, using the red glasses, Jin transforms into the mighty Ultraseven X...!