O Pioneers! is a story of the immigrants who came to America to build new lives for themselves. Struggling against poverty, ignorance, drought, and storm, they came to love and understand the land, until it rewarded them with a richness exceeding all imaginings.

The Bergsons are a family of strong-willed Swedish immigrants who have come to make a living on the great prairie. When the father, John, dies, worn out by disease and debt, his eldest daughter, Alexandra, becomes the head of the family. This is the story of her love affair with the land—an American Midwest that is vast and golden.