Noé Archiviste is looking for the famous Book of Vanitas in nineteenth-century Paris. He is spared from a vampire assault while flying aboard an airship by an eccentric doctor named Vanitas, who also happens to be carrying the tome he is looking for. Ironically, the self-proclaimed vampire expert is a regular human who acquired his name and the book from his teacher, the legendary Vanitas. As the strange case of the Charlatan's Parade unfolds, the doctor's power to resurrect vampires' sanity by learning their actual identity will come in handy.