In the lower-class society of old Shanghai in the 1930s, orphan Li Dao was forced to make a living in the Huajie area of Zhabei. He hated the boss Wu Siye who bullied him. Occasionally, Li Dao would engage in some sneaky things. But a letter asking him to go to the concession changed his life. According to the address on the letter, he came to a villa on Xiafei Road. Met the international communists who live here and are subordinate to the world intelligence organization - the Communist League. Li Dao's father was a member of the organization and died of persecution by the Kuomintang. After reading the "Communist Manifesto", Li Dao asked to join the organization, but Ulanov believed that his age and resume were far from meeting the requirements. In order to join the organization, Li Dao took the initiative to participate in the organization's "Flag Protector" program to select agents.
At the same time, Li Dao met the beautiful girl Daxinia who lived in the villa opposite, and the two cherished each other. The two then traveled north and south, from the Concession to Manchuria, from East Asia to Europe... With the intervention of Wang's puppet agents, secret police and skeleton legions, a counterattack plan from the evil faction gradually emerged.
Purpose: To show the story of a poor boy who has grown into a proletarian revolutionary through countless self-ideological struggles and material temptations.