"Mighty River" is a documentary film that explores the significance of the Missouri River in the lives of the people who live along its banks. The film highlights the river's role in shaping local culture, economy, and ecology, showcasing the diverse communities that depend on its resources. Through interviews and stunning visuals, "Mighty River" emphasizes the importance of preserving this vital waterway. It addresses environmental challenges and the impact of human activity on the river's health, urging viewers to recognize the interconnectedness of nature and society.