Falco follows Ménard for days, watching his every move. Since graduating from the coma, the Commissioner lying to him ... Meanwhile, Clara Benetti, twenty-four years, was found dead while she was supposed to have been murdered by a serial killer, Drouet, at the age of six. Where was for eighteen years?

While Falco is more than ever face the lies of the past, the corpse of a carpenter was found in his home, brutally executed ... Strangely, his identity is false. His daughter, born in France, ignorant of his true identity ...

Christine Malot is called by the hospital, then announces it new that she hoped not, a suitable donor was found to perform heart transplant for his son. But when remove the organ, the police arrested the operation, the body may have been victim of a killer, an autopsy is needed to determine the exact causes of death of the little boy graft then can be performed. Falco Knight and make it to the hospital to announce the sad news to the mother. This is when it loses foot and takes hostage, a heart surgeon, Falco and Cheron that we can graft the heart of his son. Falco will have to understand the implication of Christine's eldest son in suspicious circumstances of the death of the donor while ensuring that Florian graft is successful despite the recent unfavorable events surgery.

A 17 year old girl was found défenestrée from home for young offenders. The knife wound adorning her abdomen is unequivocal: she was murdered. Falco Knight and discover a neighborhood on the brink of explosion. Two camps clash. On one side the home and its occupants, led by its director. On the other neighbors, guided by the owner of the bar opposite, convinced that all problems come from the corner of the girls. While the first suspicion falls on the home and the past of ex-offenders, the investigation quickly focuses on a personal vendetta ... related to the accidental death of a young man in the neighborhood, a month earlier. The problem for the two officers will then discover the truth without triggering a riot that may end in lynching.

Eleanor, that Falco was sheltering some time back in his life. She is determined to understand who handled their past and why. Falco just can not both investigate and protect. The choice of Eleanor will then put them both in danger. Meanwhile, a police officer nearing retirement was abducted and her abductor promises to judge him. A race against time begins. Falco and Romain discover that the person who holds the cop called Louis. He has 20 years and militates against the police for years, via the Internet, disclosing its burrs. If it has turned a corner in violence is that her best friend, Manon, was herself a victim of police violence ... but the culprits have been tried, aggrieved by justice, she commits suicide. Falco Knight and therefore will try to stop a man determined to take the law itself. Only the young man ignores actually the truth more complicated than that.

A corpse was found asphyxiated in dichloromethane in an old trailer. If his identity is unknown, he left a message: an early name "Lor". Falco and his team then put the finger in a health scandal stifled by the company responsible, Orfleur. Two paths open. A victim of the scandal that wants revenge ... or conversely CEO Orfleur who would silence those who might do dive. In the center of the vortex, Leah Butler, the No. 2 Orfleur oscillating between all shut up and swing ... While his family life is weighed down by his inability to communicate with her husband. Falco he will come to save multiple opponents who dream dead?