The fates of emigrants are strange; the air of a foreign land is bitter. But it’s even worse when everything in the world goes off its tracks and the homeland becomes a prison, coworkers—traitors, and the best girls in the world spy on those who have long been due to marry. Surgeon Alexander Voronin, an emigrant of the fourth generation, has long grown used to the idea that he is an American, not a Russian. But it is precisely to him that fate will entrust unraveling a knot tied nearly a hundred years ago—when another Alexander Voronin, his great-grandfather, received from the last of the Persian shahs a deadly and honorable gift: a silver trinket for which it was allowed to kill, betray, execute…