On the outskirts of Seoul, a young man named Yu Yongyuan (Han Suk-kyu) runs a small photo studio that he took over from his father. He always faces life with a smile, and there are different photos hanging in the photo studio. Due to her work, female traffic policewoman Jin Delin (Shim Eun-ha) has to go to the photo studio every day to develop photos, and thus she got to know the honest Yongyuan. Sometimes she would complain that the photo studio was open too late, and she looked so innocent and cute. They walked together with an umbrella, talking about trivial matters, and they fell in love with each other over time. Yongyuan and Delin both found that they were irresistibly in love with each other. But Yongyuan had a secret that he couldn't tell Delin directly. The seasons changed, and August passed. Delin, who couldn't see Yongyuan, wrote a letter to him and stuffed it in the crack of the photo studio's door. In the snow in winter, Delin saw her own photo in the closed cabinet of the photo studio...