The romantic comedy explores age differences in relationships, in particular between a 33-year-old woman and her best friend's brother who is nine years younger.

She dreams of someday working for a company that she can be proud of, and of finding the man of her fantasies: someone her age who has a good educational background and is financially stable, who'll provide warm support when she needs it, and who'll go with her on a world tour in a campervan.

One day, she gets into an accident with her friend Seung-hye's younger brother, Chul-soo (Chun Jung-myung), and begins to see him in a new light.

Park Chul-soo is a 24-year-old high school graduate working as a mechanic at a car repair shop.

Although Chul-soo does not seem to have much, he is filled with maturity and enjoys life by doing the things he loves: working as a mechanic and traveling.