Based on facts and drawing on the messages that Jules Verne hid in some of his books, the novel reveals the best-kept secret of the author of Extraordinary Journeys books. Three stories come together in a surprising ending that reveals Verne's true face. In January 1886, Jules Verne receives a mysterious letter containing details of the most secret event of his life, something even his own family don't know about. In March 1972, Jean Moné, the gravedigger at La Madeleine cemetery in Amiens, discovers a mysterious note left by his predecessor, Nicolas Bergé. In April 2013, Monique Royale a student at the University of Picardie Jules Verne, tells her professor that for her final thesis she is going to investigate the mysterious destruction of Jules Verne's personal papers in 1898.