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.