The awesome task of rebuilding the world has been left to his protege Vin; a one-time 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 strage 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...