Ursula and Gudrun Brangwen are sisters living in The Midlands in England in the 1910s. Ursula is a schoolteacher, Gudrun a painter. They meet two men who live nearby, school inspector Rupert Birkin and Gerald Crich, heir to a coal mine, and the four become friends. Romantic relationships quickly develop as the novel progresses.
All four are deeply concerned with questions of society, politics, and the relationship between men and women. At a party at Shortlands, the Crich family's country manor home, Gerald's sister Diana drowns. Gudrun becomes the teacher and mentor of Gerald's youngest sister. Soon, Gerald's coal-mine-owning father dies as well, after a long illness. After the funeral, Gerald goes to Gudrun's house and spends the night with her while her parents sleep in another room.
Birkin asks Ursula to marry him, and she agrees. Gerald and Gudrun's relationship, however, becomes stormy.
The two couples take a holiday together in the Austrian Alps. Gudrun begins an intense friendship with Loerke, a physically puny but emotionally commanding artist from Dresden. Gerald, enraged by Loerke and most of all by Gudrun's verbal abuse and rejection of his manhood, and driven by his own internal violence, tries to strangle Gudrun. He suddenly becomes disgusted with his actions and lets her go. He leaves Gudrun and Loerke to climb the mountain, eventually slipping into a snowy valley where he falls asleep and freezes to death.
The impact of Gerald's death upon Birkin is profound. The novel ends a few weeks after Gerald's death with Birkin trying to explain to Ursula that, although he needed no other woman than Ursula, he valued a relationship with Gerald that is gone forever.
