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.

After being blinded in a coup against the king, Joseon's greatest swordsman goes into hiding, far removed from his city's anguish. But when traffickers kidnap his daughter, he has no choice but to unsheathe his sword once more.

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.