Wrongfully accused of child abduction and murder, the angelic-faced single mother, Lee Geum-ja, is released from prison after thirteen long years. Hell-bent on taking her sweet revenge on the man behind the hideous crime, Lee hatches an infallible plan of retribution with the help of her cellmates; however, planning is easier than doing. Now--as Lee Geum-ja struggles to make amends with the daughter she was forced to give up--at the same time, she finds herself torn between her insatiable thirst...

An average man is kidnapped and imprisoned in a shabby cell for 15 years without explanation. He then is released, equipped with money, a cellphone and expensive clothes. As he strives to explain his imprisonment and get his revenge, Oh Dae-Su soon finds out that his kidnapper has a greater plan for him and is set onto a path of pain and suffering in an attempt to uncover the motive of his mysterious tormentor.