Anne Dupraz, a respected and feared prosecutor, is in police custody for shooting a man who is now fighting for his life. Although she admits her guilt, she seems unable to explain her actions. The situation is exceptional. As most prosecutors know Anne well, Carla Meier, a German-Swiss native who has recently arrived in Geneva, is called in.

The case is all the more troubling because the man Anne shot was a shady character who frequented the nightlife and prostitution scenes. In order to understand why Anne was willing to sacrifice her career and her freedom to shoot this man, Carla will have to unravel the threads of the past. By questioning all of the case's protagonists during their period of police custody, Carla and her colleagues gradually uncover the secret that Anne would have preferred to keep hidden forever. It is her story that the series will reveal. As Carla delves deeper into the shadows of Anne's history, interconnected lives from Geneva's underbelly emerge, revealing motives tied to hidden traumas and unspoken truths that propelled the prosecutor to this desperate act.

The narrative builds through intense interrogations and revelations, transforming a shocking crime into a profound exploration of personal liberation through the power of speech.