Il Fiacre n. 13, from the novel of the same title by Xavier Henri Aymon Perrin, Count of Montépin, a highly prolific and much-loved author whose books were vehicles for the depiction of social inequality, narrating stories of love, death, betrayal, blackmail, and redemption. The sweeping narrative of Il Fiacre n. 13 was mutilated by the Italian censor’s suppression of its first part, the most cynical episode, which sets the scene for a scheme discernable in the other three episodes, as the story develops from a sordid murder through plotting and deceit to finally reach a happy ending.

Based on the novel Les Mystères de Paris (1842) by Eugène Sue. It consisted of four episodes, each with three parts.