DeSmet is a well-established town and the Ingalls family owns a homestead outside of town as well as a story on the main street. There are early signs in nature that the winter will be particularly cold and long. The Ingalls decide to move into town for the winter and thus share the fate of their neighbors as one blizzard after another pummels the region from October through May. The trains can't get through with food supplies, school is usually closed and the townspeople run dangerously low on food. Two daring youths (you'll recognize one of them from Farmer Boy) race yet another blizzard to try to find desperately needed food.