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 Nicole 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.