As an unforgettable storm lashes the Breton town of Perros-Guirec, a ten-year-old boy goes missing.

François Sentinelle has two lives. By day, he is the most famous cop of Réunion Island, known for his tough methods and flowery shirts, pursuing criminals in his famous yellow defender. But the rest of the time, Sentinelle is also a charming singer.

Djéné is a 45-year-old chambermaid employed by a subcontracting agency, working in a large Parisian hotel with deplorable working conditions. One evening, she discovers one of her colleagues unconscious, a victim of the frantic pace imposed by their managers. Djené decides to bring her colleagues together to make their voices heard.

Despite his fame, Taillandier has suddenly stopped painting. Deeply depressed, the sixty-year-old decides to go away. He has no clear goal and explains nothing to his close friends. During his travels, he has a strange encounter with Marylou, a wild teenager who was rejected by her mother. The lost girl and the man at the end of his tether will travel together awhile. Finally living like a father and daughter, at peace.

Annecy. When Valentin Poncet, an exemplary firefighter with a remarkable past, is found dead in suspicious circumstances, Commissioner Cassandre and her team must untangle the threads of a murder that appears to be linked to a burglary. Between the discovery of a mysterious fiancée Val may have had, the shadow of a dangerous arsonist looming overhead, and tensions within the fire station—still reeling from this second recent tragedy—each clue raises new questions and sheds light on a tragic family history with deeply buried secrets.

The body of Maude Gaillard, 52, a well-liked psychologist, is found dead in the grounds of a luxury hotel. Suspicion quickly falls on Ida Malapeyre, an unstable patient under judicial supervision whose connection to the victim may be more complex than it appears... As Cassandre's team investigates this lead, the investigation takes an unexpected turn: Cassandre is kidnapped! To save her and uncover the truth, the team must unravel a past that some were willing to kill to erase.

Spring reveals the secrets buried under the Sapenay pass, overlooking Lake Annecy. As the snow melts, a hiker discovers in a cave the body of a woman, killed by a bullet through the heart. Near this still anonymous victim, two other bodies, men, lie under the snow, frozen for years.

The discovery of a man’s body in the shower cabin of local baths plunges the establishment into astonishment. Without identity papers and unknown to the registers, the victim can only be identified through his fingerprints.

During a paragliding competition, a man is found dead. He is none other than Capucine’s ex-boyfriend who has just won first place. She had recently left the latter because of her jealousy and alcohol problems. He had, however, discovered elements about the disappearance of Romain, Capucine’s little brother, 20 years earlier. In parallel, the team is preparing to participate in a bike race for an association. Commissioner Cassandre risks slowing down her team and Lieutenant Maleva learns of her pregnancy.