Paris, 1830. In the heart of the town, Vidocq, a famous detective, disappears as he fights the Alchemist, an assassin that he has been pursuing for a few months. His young biographer, Etienne Boisset, decides to avenge Vidocq's death and takes the investigation on...

Cast: Gérard Depardieu, Guillaume Canet, Inés Sastre, André Dussollier, Édith Scob, Moussa Maaskri