The world is ending. Ash falls so thickly it buries crops. The mists linger longer each day, killing those they touch. And Ruin - the ancient force that Vin was tricked into releasing - is free to reshape the world in its image. Life under the Lord Ruler is starting to look like paradise by comparison. Vin and Elend lead a desperate campaign to locate the Lord Ruler's hidden caches of supplies, racing against an enemy that is not a conqueror but something closer to entropy itself - a will bent on unmaking everything. Scattered across a dying world, Sazed struggles with a crisis of faith, TenSoon faces judgment from his own kind, Spook is drawn toward a dangerous new power, and Marsh fights to hold on to what remains of himself. The final volume of the Mistborn trilogy, where the courage and faith Kelsier once kindled are tested against overwhelming odds.