Prophecies surrounding the people of Oldtown-Against-the-Wall collide with the realities of their unresolved conflicts. The people of science and the people of the mystical arts remain separated by philosophy, ignorance, and generations of time on either side of the great Wall. The heart of this great war falls upon the shoulders of three young orphans, gifted with preternatural skills in science, foresight and one who is no longer merely human, but an angel of death itself. Together, they must learn the truths that have kept their cities apart and protect their people from one who would willfully destroy them all. The Chronicles of Aesirium come to a stunning conclusion in Book 6: The Crook and the Blade.