The narrative opens with a parable-like origin of an industrial city traced to a fallen willow and a water-rat, then unfolds in three parts that move from factual account to portraits of people and finally to outcomes. It contrasts the encroachment of mills and commerce on a fragile rural landscape with close, often ironic observations of townsfolk and migrants. Through episodic scenes and character sketches it examines social change, ambition, and the human costs of progress, while recurring natural imagery emphasizes transience and the reshaping of environment and community.