Istanbul, 1840: the new sultan, Abdulmecid, has heard a rumor that Bellini's vanished masterpiece-a portrait of Mehmed the Conqueror-may have resurfaced in Venice. Yashim, our eunuch detective, is promptly sent to investigate, but-aware that the sultan's advisers are against any extravagant repurchase of the painting-decides to deploy his disempowered Polish ambassador friend, Palewski, to visit Venice in his stead. Palewski arrives in disguise in...