After 6 decades of brutal murders the West Yorkshire Police fear they might have previously The Ripper and let him back into the planet to keep his reign of terror upon the citizens of Yorkshire, but matters become difficult for the Authorities whenever they discover they not only have The Ripper to capture, but a copycat killer is also too large. Assistant Chief Constable of their Manchester Police, Peter Hunter, is also called in to oversee the West Yorkshire Police's Ripper evaluation, with the aid of John Nolan and also Helen Marshall, both detectives from the Manchester Policeand they choose to go back and look at the crime reports from the Rippers victims to see what they might have missed.