The plot begins in the winter of 1964, spanning more than 50 years until the comprehensive reform and re-emergence of the "Third Line" enterprises in the new century and the new era. Against the backdrop of the magnificent times, it tells the moving stories of two generations of "Third Line" people in Liupanshui about their careers, families, emotions, and destiny, highlights the heroic group portraits of the "Third Line" construction, and eulogizes the "Third Line" spirit of "hard work, courage to innovate, unity and cooperation, and selfless dedication."