Follows criminal investigations in Paris from all the different points of view of a criminal investigation.
Pierre must face the possibility that some of his nearest and dearest could be implicated in the murder case he is following, which is now linked to some very high-ranking names. Laure Berthaud's team investigate the apparent murder of a baby by his nanny, while ambitious young lawyer Joséphine Karlsson is recruited as the public half of a new legal partnership.