While the DPJ is entrusted to a new Commissioner, replacement of Menard Romain disappeared ... Falco receives a video showing him tied and shackled in kilograms of explosives. It serves as a lever to push Falco to help a prisoner escape to local IGS. The policeman began by refusing, but the kidnapper, a woman, extirpated by force Romain enough to tip the balance: Pauline and Carole. While Falco accepts blackmail, Eva investigate the man who has to escape, Alban Dauzier and seeks to identify and locate the woman who kidnapped Roman. The escape attempt was cut short and turns into hostage. Falco manages to get by, but ends up with its own DPJ and the IGS in pursuit. Isolated, it can only rely on itself to achieve save Romain.

Falco and the team of the DPJ have been manipulated by Michel Drouet who managed to escape. Falco, it is not simply trying to regain his freedom. Old and sick, Drouet has a plan ... and very specific targets. While Falco gives everything to stop this killer and prevent it kills again, he runs into his civilian single condition: it is no longer a cop, and it was he who chose. Between investigation submarine, old grudges and reunion with his friends, Falco will face its past.

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 sixty year old woman is brutally attacked and left almost dead in the street in broad daylight. His fingers were broken to make him confess something ... but she refuses to say what. It's just something binds to a murder that took place a week earlier in similar circumstances. Grenier, an obstetrician who worked with inmates was also tortured. The puzzle is completed as and as Falco and his crew discover the key elements. A women's prison. Birth under X. detained victims of lies ... and a killer in search of a child that her mother would have never wanted to give up.

A headless skeleton was found in a Paris wasteland. Early indications point to a never resolved disappearance, that of Yazel Brahni, eight years earlier. The main suspect was her former lover and art teacher, Ludovic Perroa never charged. Falco revived the investigation with these new elements, offering hope to understand what happened to the husband and the daughter of the disappeared. Only the setting that seemed to just stick with the provocative personality of the artist proves that he has nothing to do with it. It's not even good corpse. Falco and Knight are exceeded, especially as Falco finally traced to Ponthieux. This is the only track on the cop to understand why Ménard was forced to shoot him.

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.

Pauline disappeared. Falco is convinced that she was abducted by Darrigade, the man who, for 25 years, made his life and that of fire Ménard hell. But Falco refuses help he would need to find her daughter ... and doubt gradually settles into the head of his friends. And if he was delirious? If everything were only a consequence of his coma? Falco is isolated and eventually interned in psychiatric hospital to finally prove that he is victim of a plot. His friends finally at his side, they investigate together to find Pauline. But before saving it will outmanoeuvre Darrigade and face one last time on his land, that of manipulation and false pretenses.