Falco is obsessed by the vision of his best friend, John Paul Menard, shooting him twenty-three years earlier. Disturbed, unable to believe it, insomniac, he gives himself fully in the investigation, assisted by Knight. A young man fled, leaving behind her little sister, wandering in the Bois de Vincennes, bloodied his teddy in her arms ...

Falco hollow past Menard, twenty-three years earlier ... Meanwhile, an anti-globalization group, previously pacifist, removes the daughter of a wealthy industrialist. While the father put on an easy release, everything degenerates when militants murdered innocent.

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 ...

Falco can not accept the death of his best friend, Ménard, a disappearance which deprives him of the truth about their common past. While everyone is mourning the police, a body is found, murdered in what amounts to a Christian ritual. An investigation begins, in which Falco suffers from the distance Romain Chevalier takes with him. Up track of cylinders used to sedate the victim and Bibles distributed by a priory, Falco discovers Samael, the angel of death, a serial killer who is about to hit a fourth time. The policeman deductions allow him to prevent another murder but is now the target of religious fanatic: he, the Risen who has seen God.

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.