Lady Vengeance

19-year-old Lee Geum-ja is imprisoned on false charges of kidnapping and murdering a child. In prison, a woman hatches a plan for revenge and wins the hearts of the prisoners with her kindness, gaining the name Kindhearted Lady Geum-ja. After serving 13 years, the avenger, with the help of her prison friends, sets off to look for the one who ruined her life.