Near the Arc de Triomphe where the elegant Parisian boulevards radiate out from the traffic circle known as l'Etoile, a greasy black smoke billows out of a chimney and infiltrates the residences along the rue le Sueur. When police are called they discover a grisly scene of mass murder inside. In the chaos of occupied Paris, a serial murderer is able to pursue a diabolical scheme of offering a path to freedom in South America. Instead, he kills his unsuspecting victims and collects the money and valuables they planned to carry to the new world. This is one of France’s most harrowing cases of mass murder, the story of Marcel Petiot. Readalike: The Devil in the White City .