While the DPJ is entrusted to a new Commissioner, successor to Ménard, Romain disappeared - Falco receives a video showing the bound and inhibited in kilograms of explosives. It serves as a lever to push Falco help a prisoner to escape local IGS. The officer begins to refuse, but the kidnapper, a woman, eradicates by force what Romain 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 escape, but finds himself with his own DPJ and the IGS in pursuit. Isolated, it can only rely on itself to achieve save Romain.
