The son of a billionaire is almost killed in a horrible accident at an amusement park and his only option to save him was to use the power of bionic technology. The son's life is saved, but he will never be the same. The son, Jiro, can't remember what his life was like before the accident, and now, where ever he goes trouble seems to follow him, often in the form of death.

Years after the accident, his father is murdered. The circumstances of his death are extremely questionable and his case is given to a secret unnamed organization that deals with cases that the government just can't handle. The headquarters of this organization is hidden, however, the office of the detectives who work for them, are scattered throughout the regions of Japan. We meet one of these groups, who work out of a small office in the middle of a very large urban Japanese city.

The detectives, a single team of specialists. Sonia Kiyama and Lucas Sato are assigned to the case, under the hand of their boss Hideki Oba. His daughter, Sakura Oba, also works there as a secretary, amongst other things.

Not much is known about headquarters itself. Mr. Oba is the one who deals directly with them.

The young man, Jiro, had his accident when he was 11 and most of his body is now metallic. Bionic. He started off in a wheelchair, eventually, he gained the strength to walk, thanks to his doctor, Dr. Monroe.

After his father's death, Dr. Monroe is nowhere to be found. Could he be behind it all?