The Sliver of Infinity, the Lord Ruler, is the locus of religious and temporal order in a world in which the skaa are slaves or worse. Half-skaa erstwhile thief Kelsior is the only person to survive and escape the Lord Ruler's most brutal prison, in which, however, he discovered he has the powers of the Mistborn, which are based on the internal "burning" of certain metals, all of which the Mistborn can use, while most others can burn only one. Now Kelsior plans his most daring raid ever, into the center of the palace to discover the secret of the Lord Ruler's power. Beforehand, his band finds the half-skaa orphan Vin in another thieving crew, where she's useful because she brings good luck. She is also Mistborn and, if she can master and learn to trust her powers, will enable Kelsior's crew to infiltrate the nobility and possibly overthrow the status quo. Intrigue, politics, and conspiracies mesh complexly in a world Sanderson realizes in satisfying depth and peoples with impressive characters.