Nina, daughter of a Greek woman who left Egypt in 1956, goes for the first time to Alexandria, discovers the city and the longing of her mother to tell her an old love story that she had years ago with a French. but the mother doesn't tell her the truth, who knows why.

Unbearable pressure, unfair competition from a young assistant: Vincent burned out in the middle of a business meeting. With his wife's consent, he was admitted to a psychiatric ward. Neglected by an overworked care team, he befriends Hélène, a young psychotic woman, who is the only one who can get him to talk and cheer up. Hélène confides in him that she dreams of getting out as soon as possible to find her son, Lucas, whose custody has been taken away from her. The Juge des Libertés denies Hélène a trial discharge, which enrages her and leads to her being placed in solitary confinement. When Vincent leaves the hospital, Hélène deceives the nurses, runs away and begs him to help her see Lucas again. Vincent doesn't have the heart to turn her in and accepts the mission.

The head of a famous artist with a sordid past is found in the catacombs in Paris. In his studio, Commissaire Rousseau and the young profiler Mariella De Luca discover a second decapitated body, his wife's. The mystery deepens when another head is found a few days later.

Lambert, a recovering sex addict, tries to redeem himself by becoming a marriage counsellor. He stays abstinent for several months, but his alluring assistant's unbridled sexuality tests his resolve.

Manuel passes 18 months at Buchenwald before his return to Paris. He wonders even before his arrival who will have the patience and passion to listen to his narrative. He chooses silence.

In the doorway of the neighborhood's most-renowned bakery, a young student collapses, shot dead. It's an inexplicable murder.