In 1800's Utah, a young woman becomes the fourth wife of a Mormon farmer. She is lonely for her husband on their sexual "off-days" when he is with other wives. When she expresses her frustration to sympathetic 'sister-wife', other woman shows how the wives satisfy their needs with each other. Later, the young new bride initiates group sex with her husband and the other wives after convincing them that it will be better if they sometimes all share together.