Widowed Lee Sang-hyeon leads a peaceful life together with his daughter aged 15 years, Su-jin. Their peaceful life is zdruncinata the moment the Su-jin is kidnapped, raped and killed with wildness. The corpse is found or in a public bathroom. Lee Sang-hyeon feels helpless, not knowing how to cope with this situation. Police did not make any progress in finding the killer that’s why Lee Sang-hyeon decides to initiate an investigation on its own. Soon receives a message that is informed that a specific building may find a number of important evidence. Once you get here, Lee Sang-hyeon finds a man who looks at a clip in which his daughter is raped and murdered. Il kill but realizes that he had an accomplice. Jang Eok, COP that if his daughter realizes that he is the killer and starts on his trail.