A score of years after he first walked into the histories of men, Anasûrimbor Kellhus rules all the three seas, the first true aspect-emperor in a thousand years. As Kellhus and his Great Ordeal march ever farther into the perilous wastes of the Ancient North, Esmenet finds herself at war with not only the Gods, but her own family as well. Achamian, meanwhile, leads his own ragtag expedition to the legendary ruins of Sauglish, and to a truth he can scarce survive, let alone comprehend. Into this tumult walks the White Luck Warrior, assassin and messiah both, executing a mission as old as the World's making . . .