Lady Vengeance (2005)

the beautiful and young geum ja suddenly becomes famous because she is accused of kidnapping and killing a five-year-old child. after thirteen years in prison the young woman is freed, but that period of imprisonment has not been spent in vain. all the while geum ja plotted revenge against his teacher mister baek, the principal responsible for his arrest. her good character among the bars has brought her many friends and allies and when geum ja gets out of prison, she is ready to put into action the meticulously designed plan.