Junwu (Park Shin-yang) is an interior designer who is about to marry his fiancée. Once he overslept on the subway home. When he woke up at the terminal, he found two girls sitting next to him, leaning on each other. He did not wake the girls up but left. The next day, Junwu saw the news that the two girls died in the carriage yesterday. Junwu felt very guilty. He even saw the two girls appear on the dining table that night. Junwu did not tell anyone about it. Gradually, he became more and more strange because of his distress, causing his newlywed wife to leave him, leaving him alone in fear. One day he met Ah Yan (Jeon Ji-hyun), a girl with narcolepsy. Ah Yan found that she had yin and yang eyes after waking up from a coma and could see all ghosts. Junwu was like a savior. He hoped that Ah Yan could help him find out the story of the two girls' ghosts.