Darkness has come to consume the world, and only Ember knows the true depths of its horror. As a hunter, Ember’s life was spent saving humanity from the flesh-starved corpses eager to devour them. Then, a fresh evil clawed its way to the surface, leaving Ember feeling she traded one apocalypse for another. Rxa gave his life to protect his kingdom. But now he’s back, undead and untethered. Craving carnage, he has gathered an army to destroy Under and any who dare stand in his way. His every intention is to leave Ember for last. For even in death, she consumes his every thought. Can Ember protect her new world after failing the last? Or will Rxa succeed in wiping out Under, a place he deems too cruel to survive?

Ember is a mortal in a world of demigods and monsters. But she is Under’s only hope at survival. Under is besieged by flesh-eating corpses bent on destruction and commanded by an immortal madman out to destroy the world. And the only thing between him and his goal of utter annihilation...is Ember. In a terrible twist of fate, the deranged King of Poison has become her prisoner. The wayward hunter now finds herself caught between two warring forces—the living and the dead. The choice should be easy. But the more time she spends with Rxa, the more she begins to question her resolve. Because the real war is about to begin. And it is between her head…and her heart.

Ember is now forced to choose between her cruel new home and the tortured soul she has come to love… Millions are dead, never to return. Hungry corpses have overtaken the cities of Under. The Ancients are silent as the fate of the world hovers on the edge of a knife. Rxa continues his crusade to end the world, with only Ember to convince him to find another way. But as the true nature of Under reveals itself to her, she must force herself to answer the question that he has been asking her this entire time… Is Under truly worth saving, or does it deserve to fall?