Tokyo isn't much fun these days, especially if you're a cop. The police department already had its hands full with the Lucifer Hawks, but now there's also a serial killer on the loose. After a dozen people are strangled, the cops finally crack the case. Unfortunately, the suspect in custody is AMP member Kiddy Phenil. Given her violent temper, Kiddy is certainly capable of murder, but she's no serial killer. She was just in the wrong place at the wrong time. After investigating a scream she heard coming from a dark alley, Kiddy encounters the real culprit, a killer cyborg known as a megadyne. Kiddy tries to battle the megadyne, but after touching it she feels too weak to go on. The megadyne flees, leaving Kiddy with blood on her hands and surrounded by cops. Things only get worse for Kiddy when her boyfriend, Ralph Bombers, is thrown off the case after a run-in with the commissioner. Ignoring orders from above, Ralph sets out with Katsumi to find to real killer while the rest of the te