After 6 years of brutal murders, the West Yorkshire Police fear that they may have already interviewed The Ripper and let him back into the world to continue his reign of terror upon the citizens of Yorkshire. Assistant Chief Constable of the Manchester Police, Peter Hunter, is called in to oversee the West Yorkshire Police's Ripper investigation and see what they could have missed. The Home Office bring in senior Manchester detective Peter Hunter to conduct a secret review of the Ripper investigation to date.