25years ago, Mi-Hee (Kim Yunjin) was an ordinary housewife, married to Chul-Joong (Jo Jae-Yun) and having a son. Suddenly, her husband died and her son went missing. This all took place at their house. Mi-Hee was imprisoned for the past 25 years. She is now released from prison and goes back to the home where everything took place.