After thirteen and half years in prison for kidnapping and murdering the boy Park Won-mo, Geum-ja Lee is released and tries to fix her life. She finds a job in a bakery; she orders the manufacturing of a special weapon; she reunites with her daughter, who was adopted by an Australian family; and she plots revenge against the real killer of Won-mo, the English teacher Mr. Baek. With the support of former inmates from prison, Geum-ja seeks an unattained redemption with her vengeance.