In the opening episode, the Ingalls leave Walnut Grove and the Carters move into their house. When Royal becomes terminally ill, Jenny tries to drown herself. Harriet makes Nels run for mayor. A man facing financial ruin shoots his wife and daughter. The Wilders befriend a wild boy who escaped from a traveling sideshow and Mr. Edwards tries to adopt him. Nellie returns to Walnut Grove. After her attempted suicide, Jenny must learn to walk and talk...