Sur les traces d'un tueur

Between 1975 and 1985, dozens of women were murdered in the greater Montreal region. Thirty-five years later, while these crimes are still unpunished, a team of experts decide to reopen the investigation files to understand if there is a link between all these crimes and if these women were victims of same killer.

In April 1977, the body of Jocelyne Houle was discovered in a field in Saint-Calixte. She was raped and beaten. The crime scene and the modus operandi resemble that of the murder of Denise Bazinet, who was murdered the same year. These similarities lead the team to the trail of a notorious serial killer who raged during this dark decade.

The brother of one of the victims receives a call from a man who says he has information about the murder of his sister. The team examines this source and analyzes the links between the various murders that were committed on the Plateau Mont-Royal. A new thesis is taking shape and brings the team in the footsteps of a murderer in Chambly.

The team analyzes the similarities between the cases of Katherine Hawkes and Nicole Gaudreault, murdered in 1977 and 1979 in Montreal. In addition to having been committed in similar circumstances, a key element unites these two homicides: an anonymous call. In both cases, an unidentified suspect called the police to confess to the crime.

The team continues to analyze anonymous calls received after the murders of Katherine Hawkes and Nicole Gaudreault. However, a link between the assassination of Nicole Gaudreault and that of another young woman leads them to consider a new track.

A former Sûreté du Québec investigator puts the team on the trail of a suspect in the case of Joanne Dorion, murdered in Laval in 1977. A doubt emerges among the members of the Dorion family, and they wonder if the thesis of the serial killer is still the one to favour.