The series follows the adventures of lighthearted Jean-Paul Moulin, a police Commissaire, and his team as they solve crimes.

A disillusioned police detective, used as a scapegoat by his corrupted superior, fights back by becoming a competent criminal.

Antoine is a social wannabe who drops an elusive aristocrat's name to get into an exclusive party. The name - Jordan - gets him whisked by two burly bodyguards into the office of the host, von Bulow, who won't accept Antoine's admission of lying, gives him $100,000, and promises $900,000 more when led to Jordan. Enticed by the money, Antoine, with the help of his friend Étienne, begins his search. He follows trails through Paris's night scene, gets beaten up and bitten, and meets Jordan's sister, Violaine. After a surreal night, he's hooked on her charms but leery of continuing his pursuit of Jordan. Von Bulow insists. Can he find Jordan, get his reward, and attract Violaine?

While his three former college friends - Thierry, Gérard and Francis have made successful careers for themselves in business, Daniel has yet to make the grade. Tired of Daniel's frequent attempts to drag them into ill-considered ventures, Thierry and Gérard decide to play a cruel trick on him by making him think he has won the national lottery.

A record company manager is on the verge of bankruptcy. He meets two musicians, a saxophonist (Joe) and his sister (Puppet), a singer and guitarist, who he will launch successfully. But Puppet is to be murdered.

Lulu is released from prison. Determined to fulfill her dream, find her kids, those of her best friend who remained locked up and go very far. The former inmate will do everything to carry out the "heist" that will get her the money.