Kai, a demon-slayer with the unique ability of holy fire, vowed to serve Coetus, the organization that trained her. This strange ability has made Kai an outcast among her peers, but the most proficient slayer. When a powerful new foe begins killing members of Coetus, Kai is tasked with stopping him, at any cost. She scours the streets hunting otherworldlies, and tracking down her target, until an attack in a dark alley sends her down a path of discovery. As she fights vampires, werewolves, and demons, she learns more about herself, and her true cause. After burning bridges, her friends become more like family, willing to die to defend what’s right. Kai will be forced to uncover secrets that risk life and death. The only question is, whose death will it be?