From the moment the first body was discovered, Commissioner Camille Verhoeven realized that he had a completely unusual case in front of him. And he turned out to be right. But where does the trace of the chain of terrible and, at first glance, completely meaningless murders go, each of which was carefully staged according to all the rules of art, and why did the killer decide to entrust his confessions to the commissar? Verhoeven's position is complicated by the fact that the entire Parisian press is up in arms against his investigative methods... For the first time in Russian, the novel "Careful Work" by Pierre Lemaitre, which opens the famous series with Commissar Verhoeven!