After a terrifying betrayal thrusts her from her mundane life, nineteen-year-old Ember is pulled into the hidden realm of the Kingdom, the world that tethers all worlds together. There, she learns the significance and power her name holds. As the long-lost heir to the former rulers, her return causes the neighboring empire of Aversus to renew age-old conflicts. Under the power of a vindictive ruler named Marcus, Aversus wants to erase the Kingdom and any trace of Ember's legacy.
For safety, Ember is placed under the guardianship of the Kingdom's lead general, Griffin. From him, she learns there is a way to defeat Aversus for good–a mystical weapon hidden by her late parents. Amidst Ember's struggles to acclimate to the Kingdom and her newfound powers, she and Griffin must work together to find the weapon before Aversus.
Tensions are rising, the fragile balance between worlds is teetering, and the Kingdom is barreling toward a fate that only Ember may have the power to prevent.