sound engineer Sang-u lives together with his aunt, his grandmother who has dementia, and his father who became a widower at a young age. One day in winter, Sang-u meets Eun-su, who is a radio producer in a local broadcasting station. She plans to record sounds of nature itself and play the recordings on her radio program. Sang-u accompanies Eun-su on the recording trips, and they gradually grow closer to each other, and end up spending a night together in her apartment. Falling in love too easily, his feelings for her get deeper out of his control.