Sang-Doo, a young single father who has resorted to the life of a gigolo to pay for his daughter's hospital bills.
One day, he sees his first love, Eun-Hwan. Circumstances had parted them ten years ago and although he forgot her over time, he never stopped loving her. Even though Eun-Hwan is engaged, Sang-Doo is determined to win back her love.
However, Eun-Hwan has her doubts even though she still loves Sang-Doo. She is engaged to Min-Suk and finds it hard to believe that Sang-Doo is sincere about her since he didn't profess his love for her ten years before. So, do the two ill-fated lovers reunite?