With a second girl reported missing, police take in another suspect. Given a troubling track record, it is essential that Laure Berthaud keeps her team under control, but how easy will that be when her own grip is starting to slip? Public prosecutor Pierre Clement pays the price for refusing to cave in to pressure from above, Judge Roban's investigation into possible curruption also causes discomfort in high places and ambitious barrister Josephine Karlsson also finds herself the target of an act of vengeance.

Police struggle to hold on to their suspect after he is hospitalised. Meanwhile, believing that the killer may still be at large, prostitutes exploited by an organised ring are terrified to work the Paris streets. Judge Roban's judgment risks falling prey to the tyranny of emotion as friction between his professional and personal life starts to make itself felt. And former public prosecutor Pierre Clement joins the bar to partner up with talented but unscrupulous solicitor Josephine Karlsson.