Based on a series of true stories posted by Ho-sik Kim on the Internet
describing his relationship with his girlfriend. These were later
transformed into a best-selling book and the movie follows the book
closely. It describes the meeting of Kyun-woo (Cha) and an unnamed girl.
Kyun-woo is shamed into assisting the girl because the other passengers
mistakenly think she is his girlfriend. Once he helps her, Kyun-woo
develops a deep sense of responsibility for her which enables him to
tolerate (somehow) the girl's abuses.