Paris 1888: With the help of forensic medicine, a sensational criminal case is uncovered. The chief of the Paris Sûreté, Inspector Goron, with the help of Lyon University Professor Lacassagne, is able to solve a capital crime that seemed unsolvable according to the methods of forensic science at the time. By analyzing the bone structure, Lacassagne identifies an unknown dead man as the Parisian civil servant Alphonse Gouffé, who disappeared months ago, and is also able to prove that he was murdered. The murder suspects include Gabrielle Bompard and her lover Michele Eyraudt.
Alexandra is a model who comes to Berlin to rekindle an affair she started in Rome with businessman Joachim Steigenwald. But he pretends to be too busy for her and has his employee take Alexandra sightseeing. He, too, immediately falls under her enchantment. When they encounter Steigenwald, she finds herself between the two men, as someone who is always up for flirting with men …