 After hastily killing a man in the snow, Plunkett is apprehended by Wisconsin State Police Sergeant Ross Anderson, who reveals himself to be a serial killer responsible for three (later seven) brutal rape/murders of young coeds.Anderson and Plunkett become romantically involved and Anderson uses his influence to protect Plunkett as his own murders increase in number and brutality.FBI agent Thomas Dusenberg is tasked with identifying and apprehending Anderson and Plunkett.