Story : Falco, still trying to realize what happened to him, is finally reinstated in the police under the command of his former teammate, now Commissioner, Jean-Paul Menard. Young Lieutenant Chevalier, Falco's new teammate, sees in him only an unpredictable and unstable man. But the mysterious murder of a taxi driver will allow Falco to prove that he lost none of his qualities as a cop and to discover, finally, the identity of his wife's companion: the medical examiner, Philippe Cheron, with whom he will have to collaborate on each case...