Bi, a young girl, grows up with her mother, Lai, who works as a prostitute to provide for them. Their lives take a tragic turn when a drunken client arrives at their makeshift home on a boat. While Lai is away shopping, the client attempts to rape Bi. Returning just in time, Lai fiercely intervenes but tragically ends up losing her life during the struggle. In a moment of desperation, Bi stabs the man to death, but not before the boat is set ablaze, leaving her homeless. That night, she flees to Ho Chi Minh City to escape the horror.
As the years pass in the late 1990s, Bi survives by living on the streets, taking on odd jobs, and pickpocketing to make ends meet. Her life takes a fortunate turn when she is rescued from a violent attempt on her life by Jacqueline Hoang, also known as "Aunt Lin." Lin has been training two other survivors of sexual assault, Thanh Nhien Phan and Rima Thanh Vy, to become part of the "Wild Daisies," a vigilante group formed to protect women from predators. Their primary target is the infamous gang leader "Mad Dog" Hai, who is notorious for trafficking women and girls into his brothels. Alongside his semi-legitimate casino business, Hai operates with three key lieutenants: his bodyguard "Half-Blood" Son, as well as drug dealer "The Dealer" Long and pimp "Scarface" Teo.
As the Wild Daisies bond over their shared mission and undergo training, they soon discover that Lin's motivations are deeply personal. She is also seeking revenge against Hai, who was responsible for the murder of her husband and young son in an attack that left her severely injured. Tensions escalate when Hong, another member of their group, is killed in a tragic raid, and their hideout is compromised.
Eventually, with the help of a mole embedded within Hai's organization, the Wild Daisies manage to infiltrate Hai's casino. In a fierce confrontation, Lin ultimately kills Hai, only to reveal her ulterior motives. She had been using the group to gain control of Hai's territory, as he was once a rival to her husband. Lin's ruthless ambition leads her to order Thanh Nhien Phan to execute Bi. However, when Thanh refuses, Lin shoots her, prompting a final showdown where Bi finds the strength to kill Lin in self-defense.
In the aftermath, Bi succumbs to unconsciousness and is arrested, resulting in a 15-year prison sentence. Upon her release, she adopts the street name Thanh Sói, embarking on a new chapter of her life, forever shaped by the trauma and battles she has faced.
