Barricaded inside the school with hostages, the killer demands Gabriel Serpent. The investigation into the cockatoo's disappearance takes an unexpected turn.

A glimpse into the world of a janitor at Grand-Brochet Hospital. Quinn and Serpent, alerted to the mysterious disappearance of Samuel Darcy, set out to find him.

Evidence found at the hermit's house leads the investigation down a new path. Quinn and Serpent must travel to the border to interview a key witness.

The woman in the video is finally identified. Serpent questions her, but something doesn't add up. Meanwhile, Mimi searches Row 13 for clues while Quinn follows the trail of the red bike.

The investigation leads Serpent to Grand-Brochet Hospital and to the garage of a former flame involved in organized crime. Detective Quinn arrives in Kingston-Falls.

The discovery of a body in Kingston Falls interrupts Detective Gabriel Serpent's vacation. With the station at risk of closing, he must lead the investigation to prove his worth.