The chaos of war, intrigue, and conquest brought together Fatima, the Persian captive, and Töregene, the wife of the Mongol emperor. It is their shared desire for revenge against the Mongols, however, that will bind their fates forever after. They've vowed to call a storm that will radically shift the power balance of the mightiest empire in the world... But can Fatima bear serving those she loathes long enough to exact her vengeance?