Jeong-won is an interior designer who is soon to be married. Ever since he incidentally witnesses the death of two young children in the subway train, he keeps seeing their ghosts sitting at his dining table. Unable to tell whether this is a nightmare or reality, his everyday life itself turns upside down. One day, he meets a woman named Yeon who has narcolepsy. He learns that she can see ghosts just like himself and senses that she could help solve the secret of his fears. He approaches her out of desperation and shares with her the fears that he couldn’t tell anyone. But after learning of the fearful secret of his own childhood, Jeong-won is even more confused. As the secrets surrounding Yeon are revealed, he begins to be suspicious about her. (kmdb)