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 girls abuses.

After a failed suicide attempt, Sang-man wakes up in the hospital with the ability to see ghosts. He bumps into four ghosts who keep following him everywhere he go. He then reluctantly works to fulfill all their wishes to make them leave him for good. On his way to help the ghosts, Sang-man meets nurse Yun-soo and attempts to win her heart.

This film is a story of May and En-seol. May returns to Seoul looking for her birth mother after 23 years of life as a Korean-American adoptee. En-seol is a taxi driver suffering from a rare cardiac disease. Following their chance encounter at the airport, they come to help each other, also by chance.