A young girl runs away from her home country to escape the guilt of causing the death of the man who raised her. She vanishes from the face of the Earth for nearly six years before her blood-brother finally discovers her whereabouts. Once he confronts her in the human world, her entire life quickly falls to pieces around her and her life is threatened by an organization of Hunters who are after her for her blood to use in a sacrifice that will give them the upper hand in their war against everything inhuman in the world. The dangerous circumstances that arise in the girl's new, fabricated life among humans leaves her with no one to help her but the family she cut out of her life a long time ago.