The special revolves around a long-lost page of Marco Polo's Record of Observations of the East travel journal (known in French as Livres des merveilles du monde and in English as Books of the Marvels of the World). Theo Argent, a professor who found this missing page, has been murdered, and Lupin is suspected as the killer. As Lupin is being chased by the police, he receives unexpected help from Argent's granddaughter Lisa.