Since childhood, Sufoh has centered his life around Slayer's Heart, a technique that renders him an emotionless, merciless killer who fears nothing. His reputation is a badge of honor among the race of thieves from which he hails. But when Sufoh releases six legendary demons that threaten to plunge the world into chaos, he must leave his people to undo what he has done. As he ventures into a world that hates and fears him, Sufoh is forced to confront not only the evil he has unleashed, but the evil within himself, and learn what it truly means to be human.