Xie Mingyue, a girl from the Xie family of Tianjin Wei Cao Yun, has a bubbly personality and does not like to be restrained. She often disguises herself as a man and walks around in the market. In an accident, she rescued Gu Qinghe, a progressive student who was being hunted, and was involved in the wave of anti-Japanese and national salvation. Qinghe's ideals and passion infected Mingyue, and she used the Xie family's water transportation resources to transport books and materials for progressive organizations. In the turmoil and turmoil of Jinmen, the two composed a love song that combines the spirit of the world with the soul of family and country.