When retired hitman’s wife goes on vacation with her friend, she asks him to look after the friend's teenage daughter. Things go awry when he is forced to use a little violence to protect the girl from juvenile delinquents, but then they are found dead and the girl is kidnapped.

Jin-ho lost his parents in an accident when he was a child, he receives hypnosis to treat his trauma related to the accident. Do-hyun, a college student gets interested in Jin-ho's hypnosis and he tries doing it too.