The northern frontier of the Great Gan is in critical emergency, and the sixth prince Chu Yun steps forward, traveling far to the bitter and cold place to garrison the border. With thunderous means, he purges corruption, fights bloody battles to crush external enemies, and defends the great rivers and mountains. Furthermore, he takes root in the border passes, leading the people to reclaim wasteland, build cities, and develop industries, turning the dilapidated isolated city into a strong defensive barrier of the country ensuring peace and prosperity for the people. This drama highlights the patriotic sentiment that everyone is responsible for the rise and fall of the world, establishing the correct values of embracing great righteousness and bringing welfare to all living beings.