Research Unit

A year after his Bordeaux detectives team was disbanded having a serial killer exposed, French national police captain Martin Bernier arrives in a mountainous village near the sea. As accidental near-witness of a fatal shooting, he rescues a baby from a car on a cliff and meet competent lieutenant Lucas Auriol, who has no idea Bernier may postulate to become his beheaded's team new boss.

Martin Bernier's first case as captain in charge at Alpes Maritimes is a call from a woman who is locked up in a car, but when it's traced, the team quickly finds the senior female corpse in the trunk didn't call, unlike her missing younger companion. The case quickly complicates, with blackmail, queer infidelity and foster placement debacle.

Leslie Sorel, 17, flirts with Raphaël Costello at a beach bar. When he tries to force her, she flees through one of his house windows. Meanwhile, a driver tries to restart his vehicle again unsuccessfully and the body of a gendarme falls on his roof from an elevated street. Leslie peeks over the wall above the scene and scapes.

A young couple, fans of actress Magali Portier, visit the abandoned castle where her first film, "The Blood of Bluebeard", which launched her to stardom, was shot. In one of the rooms, recreating the end of the film, three bodies hanged by the neck: two of them, mannequins, but the third is Magali's corpse, dead to a blow to the temple.

Commandant Angelie attends the presentation of the new products of Huiles Alfonsi at the family house. Vincent Farnese, CEO, tries to convince her and friend Léo Grasset to press their olives at Alfonsi's olive mill. Shortly after, Farnese tells girlfriend Catherine Alfonsi, he must leave to see his sick mother. Three hours later, Pascal Mergault, friend of Farnese's, returns home.

Microlight pilots spot the body of a naked man, lying face down. Around him, the undergrowth was burnt in strange concentric circles. Dispatched to the scene, the research unit gathered surprising evidence. The victim, Laurent Keller, was a member of a group of ufologists. The witnesses are convinced: he was killed by extraterrestrials.

On the terrace of a sumptuous villa, Simon Novak, elegantly dressed, lights candles. Feverish, he seems to be waiting for someone. The next day, his body is found on the rocks below. The search team is surprised to discover that he was not the owner of the villa, but a maintenance worker. Perhaps he was murdered while trying to pass for someone he wasn't.

Matthias Wagner escapes from prison in a laundry van. Next day two hikers find his corpse in a skip near Mouans-Sartoux. Although MO suggests the mafia, Procureur Calvi reports Wagner was a businessman who was sentenced 8 years for killing his business partner, apparently in self-defense, and was to be released in 15 days, for good behavior.

On the terrace of a bistro, Charline Balestre's handbag is snatched from her by David Bréand, a street guitarist. He sets off in pursuit of the thief, but is hit by a car and dies instantly. An hour later, Charline was found dead in her home, her throat slit. The Research Unit discovers that David and Charline had recently become a couple, which displeased her mother Edith.

Ready to attend a simulation of an intervention against terrorists by the army's special forces with her friend Sabine Carsenac, Cécile Duchamp, 38, specialist in sports medicine, receives a call from an ex to whom she insists their relationship is over. During the simulation, an unexpected shootout with real bullets mixed with blanks causes casualties.

A Guyanese woman, who was to testify in Nice, was escorted by Chief Warrant Officer Luc Irrandonéa and Clément Degas, a police officer from the Service de protection des hautes personnalités (SPHP). On reaching his destination, Clément ran off in the direction of a public garden. At the same time, a gunfight broke out. Dispatched to the scene, the Section de Recherches found the lifeless body.

Nina Renoir, a young university physics professor, says goodbye to her students and goes to a hotel in Cannes, where she changes her clothes and starts working as a cleaning lady. His lifeless body is found in one of the rooms hours later. The SR discovers that Nina had left her job in a research laboratory for a month to be in the hotel.