A tear gas bomb explodes in the office. Lapointe and Léo have never felt so threatened, especially since the main suspect has not yet been arrested. Corinne and Josée testify at the trial of Fabien Bergé.

Bernard Nadeau makes a proposition to Legrand that could change his life. Inès is in turmoil upon learning of the murder of a victim linked to an old cause. Surprising information changes the situation in Maxime's investigation.