Synopsis：Fresh graduate Lü Changjiang and his friend Chen Fangyuan head west to start a business as travel vloggers. Along the way, they meet volunteer He Xiaoqing and three open-minded elderly companions. The six of them journey together, witnessing the transformation of the Yangtze River. At the foot of Geladandong Snow Mountain, the three young people gain insight into environmental protection and the true meaning of life, each finding their own path and completing this source-tracing journey about dreams and legacy.