A tragedy shakes Beaufort College. A gunman opens fire on the students, killing several before losing his own life.

The search for clues continues and the interrogations led by Coroner Éliane Sirois and Sergeant Boisvert intensify. One of the victims comes out of a coma and makes an unexpected revelation about the shooter.

The prints found on the murder weapon put the investigators on a new track. Léa finally confessed to the secret that had been eating away at her. The investigators learn more about Jeremy's intimate life.