Krakauer takes readers inside isolated communities in the American West, Canada, and Mexico, where some forty-thousand Mormon Fundamentalists believe the mainstream Mormon Church went unforgivably astray when it renounced polygamy. Defying both civil authorities and the Mormon establishment in Salt Lake City, the leaders of these outlaw sects are zealots who answer only to God. Marrying prodigiously and with virtual impunity (the leader of the largest fundamentalist church took seventy-five "plural wives," several of whom were wed to him when they were fourteen or fifteen and he was in his eighties), fundamentalist prophets exercise absolute control over the lives of their followers, and preach that any day now the world will be swept clean in a hurricane of fire, sparing only their most obedient adherents.