Bête noire the collateral effects of an unforgivable act commited by Jérémy, a 16 year-old teenager. With the help of the psychiatrist-coroner in charge of the investigation, his mother tries to understand how her son, a seemingly normal boy, could commit such a heinous act. What caused this nightmare? When did everything change? Together, the two women try to solve the mystery of Jérémy.

O suburbie luxoasă din Stockholm este zguduită de tragedia petrecută la un liceu, iar o adolescentă aparent normală ajunge să fie acuzată de crimă.