Everything she thought she knew is ashes-her home, her crown, her future. Only one thing remains for Emilia. She must find the truth of the Narrow Gate and the Ancient One's power before the Emperor does. The future of the Insurgos depends on it.

A forgotten kingdom and bloodline stands in her way, and Felix holds the key to unlocking it. But opening this door will divide the loyalties of those she came to save.

With the weight of a prophecy and the expectations of an exiled people on her shoulders, Emilia must lead those loyal to her into the heart of the fire. To save her people, to redeem her past, will take every bit of faith she can muster. But that faith may require the ultimate sacrifice...and it may not be her own.