For generations, the kingdom of Eventide has sheltered behind its protective walls, believing the monstrous horrors of the old wars are merely the stuff of legend. But Asher, a simple village boy, yearns for the adventure those legends promise. When a royal secret shatters his sheltered world, he is thrust into a hidden war for his kingdom's survival.

Forced to embrace a legacy of power and betrayal, Asher must become the weapon his family needs. Yet, the true threat lies beyond the walls. Ancient enemies stir, their hunger promising to consume not only Eventide, but the fragile peace of the Five Kingdoms.

As Asher trains beside hardened warriors and unravels the secrets of his past, he faces a terrible choice: fight the monstrous enemy and risk losing himself to the darkness, or watch his kingdom burn.

Could the key to saving his kingdom lie in the very monsters he must fight?