Shen Yuqing, the daughter of a wealthy businessman in Jinling, was forced by the Japanese army to cooperate with her father. She secretly joined forces with the patriotic businessman Lu Yan, used her own business to transport anti-war supplies, and also used social occasions to collect Japanese military intelligence. After the Japanese army became aware of it, they seized the business and arrested Shen's father. Shen Yuqing and Lu Yan took the risk to rescue Shen's father and persuaded him to refuse to cooperate with the Japanese army. In the end, they sent the supplies to the front line, and Shen Yuqing also joined the underground party.