Lucie is a specialized agent in the scientific police. Her solitary daily life is disturbed by the arrival in her housing estate of a young couple and their little girl. While Lucie gets to know her new neighbors, she discovers that Yann, the father, is an anti-police activist with a long criminal record. Lucie's moral conflict between her professional conscience and her desire to help this family will shake her certainties.

8-year-old Vicky has a mysterious gift: she can recreate any scent she comes across, even that of her beloved mother Joanne. When her estranged aunt Julia suddenly returns to town, the invocation of her fragrance plunges the young girl back in time to unravel a past replete with family secrets.

Amin has come from Senegal to work in France, leaving behind his wife Aïcha, and their three children. He leads a solitary life in France, where the only space he occupies is his home and the building sites on which he works. Most of his earnings are sent to Senegal. One day, he meets a woman, Gabrielle, and a relationship is born.