"Should it be this easy to commit a murder?" Morgain Muirdoch is no stranger to killing. As a member of the Steelfated, combat is a near-daily reality of her life. The Steelfated are a bulwark, a shield protecting the Tuathan Highlands from the Mistbourne. But hunting someone down on another's orders does not feel like just killing. But a debt for services already rendered must be repaid, especially when that contract is with the Fey. She was warned but assured herself and her superiors that she knew the risks. This bargain not only indebted her, but also Radyn Halstraad, the son of her family's ancient ancestral rivals. Her deal with the Fey has left them inextricably bound, by magic, their duty, their debt, and perhaps more. Membership in the Steelfated is unpredictable, dangerous, and difficult at the best of times. But rapid-fire changes, new leadership, new technology, recruits, and dangerous, intelligent new types of Mistbourne have caused more upheaval in two months than in the last two centuries. Morgain and Radyn are caught in the epicenter of this deadly new reality. And the Fey are calling in their debt.