
Bête noire presents the side effects of an unforgivable act committed by Jérémy, a 16-year-old teenager. With the help of the investigating psychiatrist-coroner, his mother tries to figure out how her son, a seemingly trouble-free boy, came to commit an act of hate. What was the trigger for this nightmare? When did everything change? Together, the two women make it their mission to unravel the mystery of Jérémy.

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.

The police make a major breakthrough and suspect that Jeremy had an accomplice. Charlie's post-traumatic shock increases. She decides to help the investigation and makes important new revelations.

The noose is tightening and investigators are following the trail of Jeremy's alleged accomplice. Still looking for a motive, Sergeant Boisvert and the coroner are interested in the theory of radicalization.

The investigators get their hands on a disturbing new element of the investigation that creates a shock wave and turns the investigation upside down. Jeremy's parents began to take steps to reach out to the victims' families.

Eliane is called upon to shed light on what prompted Pascale to poison her two children. While Madeleine, 7 years old, is between life and death, Henry, 4 years old, could not be saved. Did Pascale act in cold blood or was she in a psychotic state at the time of the tragedy? In order to understand what really happened, Eliane teamed up with her faithful collaborator, Boisvert, as well as with the fearsome defence lawyer, Michelle Simon.

The pieces of the puzzle are falling into place. While Pascale refuses to speak to Éliane, the latter must mandate a colleague to get her opinion on her patient's psychological state. Little Madeleine can finally leave the hospital, but she demands her mother, which Jean-Philippe refuses. Julien revisits his past in search of comfort, and Boisvert sets out to find Pascale's biological mother.

Now medicated against her will, Pascale has withdrawn and refuses to eat; Éliane contacts a former patient to help her break through her shell. As little Henri's funeral approaches, tensions rise within her family. Pascale's biological mother explains the reasons that led her to give her up for adoption. Camille receives surprising confidences from Madeleine. While trying to learn more about Shanny, Boisvert makes a surprising discovery.

Pascale, in crisis, is found in a church. In Éliane's eyes, the theory of religious delusion is no longer in doubt. Boisvert meets Alexia, Jean-Philippe's young mistress, and continues his research to trace Pascale's biological father. Mr. Simon receives Madeleine's testimony and negotiates a sentence with the Crown prosecutor. Éliane and Boisvert question Pascale's neighbors, which leads them to a new lead.

Pascale's trial begins. After a colleague's testimony, Jean-Philippe is called to the stand. His extramarital affair with Alexia, who was 17 when they met, is revealed, causing turmoil in his family. Forced to appear, Julien goes to court; the Crown prosecutor isn't kind to him. After being prepared by her child psychologist, Madeleine delivers a heartbreaking testimony.

It's now Pascale's turn to tell her side of the story at her trial. Éliane's testimony follows, providing an accurate and touching portrait of her patient. Boisvert finds an unorthodox way to get his hands on the DNA of Pascale's presumed biological father. Mr. Simon and Mr. Pépin-Tremblay deliver their final arguments before an attentive jury. As Madeleine eagerly awaits the moment when she can see her mother again, the verdict is delivered.
Complete episode guide for Bête noire with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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