Apparently, false rumors about Marie Antoinette are all the fashion in 1783.

Marie Antoinette is facing hostility from the populace, inflamed by rumors circulated in pamphlets throughout Paris. The rumors claim that she has dozens of lovers, drinks the blood of poor people, holds satanic masses at Versailles, and more, when nothing could be further from the truth. On the advice of the handsome, enigmatic Captain von Bauer, Joseph II--emperor of Austria and Marie Antoinette's brother--decides that mystery-solving violinist Theresa Schurman is the ideal candidate for a spy to discover the source of these vile slanders.

Theresa is only too glad to get away from Vienna for a while, unwilling to commit herself yet to marrying Zoltan--a Hungarian baron she met when she was fifteen--and running out of reasons to postpone her decision. She is eager, too, to explore a new musical scene and broaden her artistic education. But when the captain confounds her expectations and places her as a bookkeeper in the establishment of Rose Bertin, milliner to the queen, she begins to lose hope that she will ever achieve her musical aims--or the emperor's goal of exposing the pamphleteers.

A chance encounter with the Chevalier de Saint-Georges, an extraordinary black violinist and expert swordsman, sets Theresa on the path to unraveling the mystery. But will the chevalier's patron, the powerful duc de Chartres, confound her efforts and put her--and the captain's--lives in danger?

Be prepared for music, mystery, love, and murder in this riveting tale of pre-revolutionary Paris.