Demons, ghouls, vampires, and Syths? The Netherworld Division are an organization of angels and humans who are there to keep the escaped creatures from The Netherworld in check in this action-packed paranormal thriller. Introducing Koa Ryeo-won, a half-blood vampire with an enchanted sword, a membership to the most elite vampire castle in Europe, and the gift of flight. If only she could manage to reclaim the lost memories of her years in The Netherworld, she might finally be able to move forward. A Netherworld serial killer, targeting little girls for the power they give him, threatens everything Koa has worked hard to protect. Not even Halston and his legendary infinity gun can stop him, but Koa's mother might be strong enough to do it—if only her curse can be broken. First stop, the Ivory Tower, where only the most notorious supernatural killers are kept. But even that won't be enough. Koa must prepare herself to return to the place that nearly killed her. The Netherworld.