1974: Fifteen-year-old Loretta slips out of her bedroom window to meet her "Gentile" boyfriend. This time, however, her strict Mormon parents catch her returning at dawn and quickly arrange for her to marry the upstanding Dean Harder, a devout yet materialistic fundamentalist who already has a wife and a brood of kids, some not much younger than Loretta herself. Trapped in her role as a "sister wife," Loretta dreams of another, better future, of a...