Being your own boss usually doesn't mean anyone's life is at stake. But for Kita Delarosa, a 26-year-old creature hunter, it does. After the death of her boss, Kita is forced to try to handle the streets without direction, but time quickly shows that she can't handle things alone. Not only that, but her life-long companion, Kaiser, disappears after an argument, leaving Kita truly alone for the first time in her life. In her search for someone who can assist her, she stumbles into a man who puts her back to work, but she soon gets more than she bargained for as they stumble upon a threat much greater than any demon she's slain before. Kita immediately sets off on the trail to discover who's behind this greater threat and what their motivations are. Kita begins to wonder if she's really able to trust anyone as she gets closer to the heart of this new threat, strangely centered on her own existence.