When a series of police officers begin committing suicide, all in the midst of investigating the crime kingpin, Goku teams with a policewoman named Yoko to uncover the truth.
Born in a covert military experiment gone wrong, cyborg Ryuu goes on a mission of vengeance against his soldier father. Ryuu'a sister, Ryouko, calls upon Goku to help stop her brother's killing spree.
While investigating the murder case of his colleague, Goku receives a cybernetic eye transplant from a mysterious group, which can hack any computer network in the world.