A deputy prosecutor in Paris has received death threats. He must now remain cautious. It was by a miracle that he narrowly escaped a parcel bomb which seriously injured the clerk. Revel and Rousseau are immediately placed on this matter. They quickly suspect the deputy's wife, a renowned lawyer, of having pressured a former convict to get rid of her husband, from whom she cannot part without having to pay a heavy pension. Unless the case hides a much more perverse manipulation. Revel and Rousseau are lost in conjectures ...

Stéphane Colin, a businessman who seems to succeed in everything, is in fact riddled with debt. One day, his wife and two daughters mysteriously disappear. Revel and Rousseau, put on the case, fear that, pushed to the limit, Stéphane has kidnapped them himself, perhaps even murdered in a moment of bewilderment. But soon, a demand for ransom reaches the grieving father and husband. The kidnapping appears to have been orchestrated by people determined to secure a large sum of money from the one they believe to be millions rich. The situation is straining. Will Revel, Rousseau and the others succeed in saving Stéphane Colin's wife and daughters? ...

A businessman was stabbed during a round of golf. It is his daughter who discovers his corpse, one Sunday morning. The young woman is suspected by investigators because the day before, she had had a heated argument with her father, who accused her of frequenting a trendy nightclub, known to be the hub of drug trafficking. But Revel and Mélanie soon have another suspect, a certain Antoine Copeau, who is none other than Mélanie's former partner when she worked at Stups. Under a false identity, Antoine Copeau became the manager of the box as part of an undercover operation ...