We go to the United States of America. At the center of attention are the events that take place in the 1980s. The main heroes are the FBI agents. They investigate the most dangerous and complicated crimes. The protagonists used to face difficult cases but the last one unsettled them. Bill Tench and Holden Ford are to investigate the case related to a serial killer who has not been tracked for several years. The main heroes have a little time to find the criminal.