Married with a family and professionally successful, Vincent Ferreira has all he needs to be happy. Sensitive about his modest origins, he dreams of joining the local upmarket club attended by the town big wigs. But with each election, his bad luck prevents him from being admitted.
Agathe is turning 30 and has finished her thesis on secret societies in France. A young woman is found dead in the Seine, murdered for a specific ritual. She is an image of Agathe, has the same first name and is similarly dressed. The traces lead to one of the secret societies this included in Agathe's study.
Franck Chaievski and Nina Delgado are two undercover detectives of a French special force trying to identify two corrupts members of the Paris Police Force. Franck is pretending to be a gangster and Nina a prostitute living with him, and involved in a robbery of a fortune in diamonds, having seven deaths and some injured persons.
Cécile adopted Benjamin at the age of two and has managed over the years to create a harmonious balance with the young boy. She is considering marrying Marc, a divorced engineer and father of two, when she receives a call from Francis Haudrant, her son's biological father. Panicked at the idea of losing him, Cécile agrees to meet him. He tells her that Benjamin's mother died when he was two months old and that he served five years in prison before going to live in Africa. Now a suburban mechanic and about to become a father again, he feels the need to know what happened to his son.
