In the year 2015, cyber-crimes, murders and terrorism have become an epidemic in Tokyo and the average police force are not capable enough to handle it all. Commander Masanao Daigo of the Tokyo Metropolitan Police Department plans to solve this problem by searching for talented candidates for his “Metal Project”.
One day, a robot sent out by the criminal organization Ido targets Jun Zaizen, the young heir of the Zaizen Konzern, during a party held in his honor. Three young men, MPD officer Ken Kanzaki, F1 race car driver Ryo Aguri, and professional wrestler Go Goda, are mortally wounded while protecting the young boy. Because of their heroic deed, the three men are chosen for the Metal Project and brought back to life as cyborgs, forming the Armoured Police Metal Jack.