The impossible has happened. The Lord Ruler is dead. But so too is Kelsier, the man who masterminded the triumph. The awesome task of rebuilding the world has been left to his protege Vin - a onetime street urchin, now the most powerful Mistborn in the land. Worryingly for her, Vin has become the focus of a new religion, a development that leaves her intensely uneasy. More worryingly still, the mists have become unpredictable since the Lord Ruler died, and a strange vaprous entity is stalking Vin. As the siege of Luthadel intensifies, the ancient legend of the Well of Ascension offers the only glimmer of hope. But no-one knows where it is or what it can do....