Audiobook 813, written by Maurice Leblanc. One evening, wealthy diamond merchant Rudolph Kesselbach is visited at the Palace Hotel by Arsene Lupin. The next day, Kesselbach is found dead from a gunshot wound, with Lupin’s card pinned to his shirt. The wanted Lupin is forced to use all his guile to outwit the gendarmerie and find the real murderer.