Centuries ago, Armageddon cast darkness across the world. From that darkness, the vampires emerged. Now humans and vampires tremble on the brink of war, and Abel Nightroad, a Vatican priest and agent of AX, protects the fragile equilibrium between the two races. Neither human nor vampire, he is strong in his endeavors for the sake of the world, seeking a safe path for all. - Humans and vampires tremble on the brink of war.