Jens Keith

Prince Klemens von Metternich orders Friedrich Gentz, one of his aides, to keep the Duke of Reichstadt---Napoleon Francois Joseph Charles---son of Napoleon and heir to the French throne, from thinking about French politics. Gentz enlists the help of ballerina Fanny Elsser, all the rage in several European capitals, to keep the Duke distracted.

A Moscow hotel waiter, found at the scene of a murder, tries to locate the real killer among a series of suspects.

Bill's girlfriend Lore is an art student in Berlin. Since her professor doesn't think much of painting women, she exchanges a genuine Raphael painting in a gallery for a copy made by her. In a spectacular theft, the copy is stolen. Detective Keller suspects Bill and Lore. But Bill, who is a talented quick-change artist, keeps escaping arrest by constantly altering his appearance.