Goku, the lone‑wolf private detective, returns to the city after taking on a contract from Ryoko, a mysterious and beautiful woman who is terrified for her life. She asks him to locate and rescue her brother, Ryu. Can Goku shield Ryoko from the soldiers of her step‑father long enough to find the missing brother? Meanwhile Ryu, an unfortunate subject of a failed military experiment, has left a trail of bodies in his wake and refuses to be saved or found by anyone. Will Goku be forced to kill the man he is meant to protect? And will his omniscient cybernetic eye and sceptre be enough to defeat this indestructible killing machine?