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