Aurore Garnier, a police officer, has been obsessed with the abduction of her 5-year-old sister Clara. Their mother, Isabelle, died while handing over the ransom. 20 years later, their grandparents are about to sell the family estate.

Clara shows up at the estate and introduces herself to Paul, her grandad. Paul and Aurore are convinced of her identity, while brothers Fred and Gabriel are skeptical. Gabriel's nightclub is burned down.

Now officially a Garnier, Clara has a say in the sale of the estate. What if her birth father abducted her and killed her mother? Could it be Ivaldi, the man who raised Clara in Italy? Aurore manages to find DNA at Ivaldi's house.

Clara's lover dies when she hit him with an ashtray in self-defense. Thelma panics, but the police suspects the dealer's death is an execution. Fred informs Gabriel that Clara refuses to sell: he won't get his share to save his club.

Ivaldi was hired by Baptisti to take part in her abduction. Things went wrong, Clara was going to be killed. He saved her, raising her as his own daughter.

Clara rushes to Baptisti's to get evidence linking him to the sponsor of her abduction but a man (the same who killed Vasquez) kills him. Clara manages to run. Aurore's husband (also a cop) discovers that his Chief Jeanne killed his wife.