Chen Feng, a younger member of the Ax Gang, became famous for assassinating a Japanese army major and was absorbed by the underground party as a "shadow killer". While performing an assassination mission in the French Concession, he formed a subtle triangular relationship with the Chinese inspector of the concession patrol house and the military special agent. When Chen Feng discovered that the Japanese army was using the opium trade to finance the military, he united all forces to destroy the opium dock, but was betrayed by a traitor. In the end, he died together with the Japanese spy leader in a firefight on the bank of the Huangpu River.