Hai Phuong, a former gangster, lives a quiet life in a rural Vietnamese village with her daughter, Mai. Struggling to make ends meet as a debt collector, Hai Phuong tries to protect her daughter from her violent past. One day, while at the market, Mai is kidnapped by human traffickers. In a frantic pursuit, Hai Phuong confronts the kidnappers but is ultimately overpowered. With few options left, she decides to track them back to Saigon, drawing upon her old skills and connections from her previous life.

Once in the city, Hai Phuong delves deep into the criminal underworld of Saigon. With relentless determination, she follows every lead and battles numerous adversaries. Utilizing her fierce combat abilities and street smarts, she navigates through various treacherous territories and confronts powerful figures in her quest to rescue her daughter. As she races against time, Hai Phuong not only faces external threats but also battles her inner demons and guilt over her past. Each step brings her closer to a brutal showdown, where she realizes the extent she is willing to go to save Mai.