Following the birth of Léo, Morgane and her four children moved in with Karadec, with whom she is now a co-parent and roommate, in addition to being a colleague! And after a parental leave consisting of sleepless nights and camping in the living room, it's back to work for our two heroes. But, between fatigue, the eternal custody problems and a mysterious crime that quickly turns into a nervous breakdown... This 24-hour day could well be the longest of their lives!

It's finally Léo's first day of daycare, and Morgane arrives at a crime scene where the victim was a carpooler when suddenly, she sees Karadec arrive... with their baby! But who brings their children to a crime scene, our consultant is offended! And yes, the commander is having trouble cutting the cord, much to the dismay of Morgane, who has seen it all. While untangling this story of cigarette poisoning, estranged cousins, and a dog shelter, our two heroes could well be troubled by their new relationship as co-parents.

A woman presents herself to the DIPJ to report an assault that hasn't yet taken place! A clairvoyant, she claims to communicate with spirits, only to be murdered herself! While Morgane and Karadec struggle to continue working as a team while hiding the new nature of their relationship, Daphné tries her hand at spiritualism, and what appears to be a hoax quickly turns into the hunt for a cold-blooded killer.

After receiving some unfortunate news about her father Serge, Morgane is forced to take the train with her family to Boulogne-sur-Mer. It's like the end of the world for our already overworked mother. On the train, which is nothing like the Orient Express, Morgane spots all sorts of strange clues that make her fear that one of the passengers has been kidnapped during their journey! Brilliant intuition or one too many delusions? While Morgane tries to escape her destiny and especially Karadec, he might well come knocking at her door again. For a new start?

Barely recovered from their breakup, Morgane and Karadec investigate the murder of an e-sports champion. Céline tries to convince her unmanageable consultant to take the police exam, but Morgane has other things on her mind: the constant harassment of her father's ex-wife, obsessed with a non-existent inheritance, and the complicated management of Léo's favorite cuddly toy, which Karadec entrusted to her...

Troubles are piling up at the DIPJ in Lille: Morgane completely messed up her police exam paper, Karadec finds himself, despite himself, associated with the accidental death of Morgane's mother-in-law, and to top it all off, Céline's son is accused of murder in the current case! Stripped off the case, the commissioner tries everything to clear her son: a Murder Party with the whole team!

Morgane and Karadec are faced with a complex case on the Belgian border. The victim, who died in France, is none other than the director of a prestigious luxury hotel in Bruges. While things seem to be finally at an end between them, our heroes embark on a Flemish escapade that could well hold some surprises for them...

Morgane's final test: her oral exam to join the police force. Faced with an impassive and demanding jury, Morgane abandons the traditional presentation of her qualities to passionately recount her latest investigation with Karadec. A story where the investigation mixes with memories, where each shared moment resurfaces, illuminated by their adventures but darkened by an imminent threat. Will Morgane succeed in becoming a cop while saving the man who meant so much to her?