After losing her country and mistress in the invasion of the Mongol empire, Fatima has leveraged her education to become a lady-in-waiting to Sorghaghtani Beki in the Mongols' imperial court. Dispatched to infiltrate a rival court as her new mistress's spy, Fatima encounters Töregene, one of the wives of emperor Ögedei Khaan. The two women, bound together by a shared desire for revenge against the Mongols, vow to work together. Before long, they'll call a storm that radically shifts the power balance of the mightiest empire in the world...