Charles and Caroline visit Walnut Grove and are pleased to be able to stay in the 'Little House' when John and Sarah Carter go out of town. Then the townspeople learn that a land development tycoon, Nathan Lassiter (James Karen), has acquired title to all the land in Hero Township, which they had believed to be homesteading land. Having failed to defeat his claim on legal grounds and even with guns against an army cavalry unit, the townspeople are inspired by Laura to vent their anger at what they see as an injustice, and they decide upon a drastic plan of action. When Lassiter arrives to claim the town, he finds all the town buildings dynamited, and the townsfolk leave to start new lives elsewhere, as many of them have done before.