Millionaire diamond collector Rudolf Kesselbach is killed in a Paris hotel room, with Lupin’s calling card pinned to his chest. With the police hot on his trail, the master burglar must use every trick in the book and more to escape their traps and clear his name by finding the man responsible for the murder. The mystery involves letters to Bismarck, a clock with the number 813 has significance, and an emperor needing to make several journeys incognito. But as Lupin soon discovers, this is not just about him the fate of Europe may hang in the balance as well.