Between 1975 and 1985, dozens of women were murdered in the greater Montreal region. A team of experts reopen the investigations.

In April 1977, similarities between the murders of Jocelyne Houle and Denise Bazinet lead the team on the trail of a serial killer.

One of the victims' brother receives information about the murder of his sister. The team sets out on the trail of a murderer in Chambly.

The team analyzes the similarities between the cases of Katherine Hawkes and Diane Gaudreault, murdered in 1977 and 1979 in Montreal.

A link between the assassination of Nicole Gaudreault and that of another young woman leads the team to consider a new track.

A former Sûreté du Québec investigator is on the trail of a suspect in the case of Joanne Dorion, murdered in Laval in 1977.

The team is looking into a new track in connection with the murder of Sharron Prior and makes correlations between this crime and others.

The team manages to establish connections with William Fyfe. For the bereaved, this new track is a ray of hope.