In 1879, young Laura Ingalls travels with her mother and her sisters Carrie, Grace, and Mary--now blind--to the Dakota Territory to meet Pa and start a new chapter in their lives.
As drought and the Depression threaten to destroy her family's South Dakota farm, twelve-year-old Christine discovers a wondrous cave, which becomes both her own private delight and a possible salvation for the family.
Carson Fielding, a loner known for his horse-training skills reluctantly agrees to work for Magnus Yarborough, a greedy landowner who suspects Carson of having an affair with his wife and plots to take revenge on the young man.
Pa's homestead thrives, Laura gets her first job in town, blackbirds eat the corn and oats crops, Mary goes to college, and Laura gets into trouble at school, but becomes a certified school teacher.
Sixteen-year-old Tabitha, the daughter of a preacher who believes science is Satan's work, longs to study at a university and dig for dinosaur bones, but in South Dakota at the end of the nineteenth century such ambitions are discouraged.