A-Hui, the beautiful Shanghai gangster, decided to retire from martial arts. In order to compete for the title of the world's number one martial artist, the various factions in the underworld took advantage of A-Hui's return home to celebrate her birthday and slaughtered her master. Her master died tragically. To avenge her master, A-Hui returned to Shanghai with her younger sister to sweep through the gangs and kill people everywhere. Unexpectedly, she was falsely accused of killing her master and destroying her ancestors. The two sisters, who were deeply trapped in the trap of foreigners and gang fighting, also became enemies. All forces were eyeing A-Hui covetously. How should she avenge her master and punish evil and promote good?