Sixty years after the end of a major war that changed human history, peace has once again been restored to human society. But behind the prosperous development, the dark forces are stirring and ready to start the war again...... At the same time, a young girl with special abilities. In order to find her mother's murderer, Aramaki Neko takes up the blade of revenge and becomes a hunter specialized in hunting the "blood clans" who hide in the night and feed on humans!