This gripping film is a compelling mystery that unfolds in the city of Toulouse. Jean, a 55-year-old policeman, is faced with the shocking discovery of his son, Maxime, and his son's boyfriend found deceased in a hotel room. As the investigation progresses, it is revealed that both deaths were caused by a GHB overdose, just minutes apart. Jean delves further into his son's life and stumbles upon the club BISOU, frequented by Maxime. It is there that he encounters Fabien, a key figure in unraveling the truth behind this tragic event.