Society was stunned by a case of serial bombings. Raito Shiba, a detective who exclusively handles superhuman cases, gets suspicious that there is nothing left behind at the scene. Raito guesses that employees of the military corporation Yatsuka Heavy Industry were attacked, and investigates the factory in Tachikawa. Then at a nearby park, he meets a girl named Mieko in a schoolgirl uniform. When the conflict worsens with the "Superhuman Bureau," which he has seen as an enemy for long, the surprising secret about Mieko comes to light. Raito, who had his life taken away by an evil organization and was made into a machine body, starts to get complicated feelings in his mind.