Kezia, an eccentric lady, lives happily in her house outside of Walnut Grove, but when she neglects to pay her taxes, the property is put up for auction. Harriet Oleson, flaunting her wealth, purchases it as a "summer home." She moves into the house with her kids and allows Kezia to stay, only if she agrees to work as a maid. Laura, Albert, and Andy hatch a plan to help Kazia reclaim her home.

Mary begins to see a bright light every time she stands in front of a window. The possibility of regaining her vision is there, but she and Charles must pay a visit to her eye specialist in Sleepy Eye to get a definite answer. While they are away, Laura and Albert start working on a surprise project for Mary, and the Ingalls family becomes concerned about Adam's recent strange behavior.