Lady Vengeance

Lee Geum Ja (Lee Young Ae) has spent 13 years in prison for a crime she didn't fully commit. She was involved in the kidnapping of a child named Won Mo, but it was under the coercion of Baek (Choi Min Sik), who had taken her son and threatened his life.

While in prison, Geum Ja was kind and helpful to her fellow inmates. Upon her release, her first intentions are to reunite with her child, who was taken from her as an infant, and to seek revenge on those who wronged her, including Baek.

In her quest for revenge, Geum Ja is helped by the prisoners she once helped. Interestingly, one of the prisoners is Baek's wife, who is the main target of her revenge. As a result, her plan goes smoothly. However, just as she is about to take her revenge against Baek, Geum Ja discovers something unexpected about the man.

It seems that Baek has been hoarding many items belonging to children, prompting Geum Ja to ask for help of a detective to track down the items. This revelation leads to the discovery of a much bigger and more sinister case-a series of serial murders involving children.