Catherine Godin never stopped believing in the innocence of her son, accused of murder. 15 years after his conviction, everything changes.

The death of a witness creates a stir in St-Bruno. Was it an accident, murder, or suicide? Did they want to silence her?

The autopsy confirms that the witness was murdered. Bing, a major crime investigator, has doubts about the Parenteau case.

As Bing and Catherine accumulate more and more evidence on Alexander's innocence, the investigation becomes more complex.

Bing and Catherine hit a wall; the BEI accuses them of having manipulated former witnesses, and Alexandre wants to plead guilty.

Bing examines the contents of the boxes of information related to the case that his father had hidden. New suspects surface.

As the noose tightens, Louis Bachand cracks under the pressure and reveals to Catherine what happened the evening of the accident.

After 15 years of sacrifices and disproportionate fights to exonerate her son, will Catherine see the light at the end of the tunnel?

Laurence Malenfant, a young policewoman, shoots a witness who has just made an important revelation about the disappearance of her father.

The BEI discovers that the man who was shot by Laurence during the police intervention was in possession of a compromising video.

Laurence and Geneviève have reason to believe that Philippe has information about the disappearance of Jean-Claude Malenfant.

Although the BEI has accumulated a great deal of evidence, new information will muddy their waters and the course of the investigation.

Two things link the victims found on Île Notre-Dame: being a police officer and leaving a suicide note after their disappearance.

The media are aware of the circumstances surrounding Poupart's death. Corbeil discovers Philippe Laberge's dark secret.

A suspect is taken into custody. Geneviève interrogates him for many hours. Will they finally find the culprit?

The truth creates a real shake-up in the lives of Laurence and Geneviève. At a crossroads, the two women will have to make decisions.