After leaving the force to focus on her family, Capt. Laure Berthaud thought she could rest easy with the streets of Paris in her colleagues' safe hands. When a grisly case involving a male torso calls her back to the field, though, Laure quickly becomes entrenched in an investigation into the sickest of France's organized crime families. As a high-profile case threatens to spoil her teammates' reputations, the walls start to close in and make Laure question whether she's made for this fight anymore.