During the election of a new Pope in the mid-18th century, famed violinist Antonio Vivaldi learns of a ring of art forgers who are replacing the Vatican's priceless treasures with expertly-painted fakes. Desperate, the composer hides a message in a special melody, hoping someone, someday, will take down the culprits . . . Nearly three hundred years later, the confession of a dying Mafia Don alerts a Venetian priest to a wealth of forged paintings in the Vatican Museum, and the key to their identities lies hidden in a puzzling piece of music. Father Michael Dominic, prefect of the Secret Archives, investigates, and is mystified when he finds a cipher in an old composition from Vivaldi. Desperate to stop this centuries-long conspiracy, he calls on fellow sleuth Hana Sinclair and Dr. Livia Gallo, a music cryptologist, to help him crack the code and learn the truth. But the Camorra, a centuries-old Italian Mafia clan, won't stand by while some interfering priest ruins their most lucrative