Joe Shimamura and eight others have been involuntarily turned into cyborgs by the evil organization Black Ghost. They use their newfound abilities to actually stop them. Akira Fudō is a teenager who possesses the powers of the devil Amon and uses them to fight various enemies. Akira and the cyborgs go head to head after some misunderstandings. Meanwhile, a greater threat emerges when Doctor Adams, a Black Ghost scientist, unleashes a new batch of cyborgs on Shimamura.