Barny, although a Marxist, is intrigued by the mysteries of religion. In confession, she teases a priest, Léon Morin, but he is a young and intelligent man and ready to discuss anything.
Growing up in the sheltered confines of a 1920s English coal-mining community, free-spirited sisters Gudrun and Ursula explore erotic love with a wealthy playboy and a philosophical educator, with cataclysmic results for all four.
