A true story shot in a German Impressionistic style. In France during the Nazi occupation, Dr. Petiot (Michel Serrault) offered to help Jews escape the Nazis. They would come to his house, and he would kindly give them lethal "vaccinations" for their anticipated travel to Argentina. Then he would steal everything the brought with them (in addition to their up-front payment to him) and burn their bodies in his home-made crematorium.

Henri Rainier has everything a man could want. A glamorous wife, two beautiful daughters and a well-paid job with a large bank. Then, one day, his entire world collapses. In the wake of a high-profile financial scandal, he is summoned into his director's office and accused of negligence. Rainier has no choice but to resign, but he soon realises that he has been made a scapegoat. He begins his own investigation in an attempt to clear his name and discover who is responsible for the enormous hole in the bank's finances. It soon becomes apparent that he is up against a very powerful and dangerous opponent.