Vendor Lu Yunsheng (played by Lu Liangwei) often fights against his neighbors and is appreciated by Sister Agui (played by Siqin Gaowa), the wife of the concession chief detective Huang Jinrong (played by Zheng Zeshi). Soon, Lu uncovered the truth about Song Jiaoren's assassination, which made Huang famous. Huang appreciated Lu, but made Hou Fei jealous. Lu and Huang came forward to calm the warlord Yuan Xiaojun...