Paris, 1892. A young provincial girl, Diane, comes to Paris in search of her missing sister. While the Parisian smart set indulges in debauchery at the Moulin Rouge cabaret, the prudish Diane demonstrates a fierce determination to become a quadrille dancer. Entering the hitherto unimagined world of the upper class, Diane uncovers a series of murders in which she might be the next victim.
