The story begins in Dakota territory on a hot August day in 1880. Laura and her father ("Pa") are working hard to bring in enough hay to feed the livestock over the winter. When they come across a muskrat's house, Pa tells Laura that he knows the winter is going to be hard because muskrats always build a house with thick walls before a hard winter, and this year, they have built the thickest walls that he has ever seen. In mid-October, the Ingalls wake one morning to find an unusually early blizzard howling around their frail claim shanty. The October blizzard lasts three days. Soon afterward, Pa receives another warning from an unexpected source: while he is talking to some men at a store in town, a dignified old Native American man enters and predicts seven months of blizzards. Impressed