Jung Ji-oh (Hyun Bin) and Joo Joon-young (Song Hye-kyo) are two people with vastly different backgrounds. Joon-young is a daughter from a rich family who faces problems regarding her mother’s gambling habits and affairs with multiple men; while Ji-oh is a son from a poor family of farmers, though he loves his mom dearly. They were lovers back in their college days, but later had a complicated break-up due to their separate relationships with other people.
When they eventually got back together, Ji-oh and Joon-young began to learn from each other and eventually Joon-young becomes more expressive, warm and understanding. However, Joon-young’s mother doesn’t approve of Ji-oh, due to his poor background. Ji-oh’s pride is deeply wounded by the treatment of Joon-young’s mother, so he decides to break up with Joon-young. Joon-young is deeply hurt and doesn’t realize the reason of their break-up, and Ji-oh constantly pushes her away. Though he still loves her, he is bothered by their differences in wealth, values and personality. Later, Ji-oh suffers an eye disease which requires an operation and results in him not being able to film. Many conflicts stand in the way of Ji-oh and Joon-young, will they overcome them and make their relationship work?