Flower of Labour

Wang, a bankrupt farmer joins his cousin, Wu, in Shanghai, but finds that he is poor too. One day, Wu stops a woman - Zhang, a drug runner - from being run down by a car, and is hospitalized. During his recovery, Wu slims down due to the amount of drugs he is prescribed, which inspires him to create and sell a weight loss medicine.

After a break-up, a college professor, Xiao, molds his maidservant, Yu, into an independent, modern woman, then marries her. However, their relationship is interrupted by the war - Yu insists on volunteering her help, while Xiao longs for a stable family life.

Before the liberation of Shanghai, Nationalist agent Zhang Rong is ordered to blend in with the captive workers of the Baotong Mill and wait for a chance to act. After the liberation, he returns to the factory, disguising himself as a far-left agitator and causing friction between the workers and management.