In a world where heroic virtues manifest as radiant, supernatural abilities, a disillusioned paladin is exiled to a blighted frontier for an act of forbidden mercy. There, among outcasts and monsters, he discovers that the 'evil' they fight is a natural immune response to the tyrannical purity of the celestial beings he once served, forcing him to harness the very darkness he was trained to destroy in order to truly save the world from divine oppression.