Sang-wu is a sound engineer who lives with his grandmother, his widowed father and his sister. One winter, he meets radio program director, Eun-su. Sang-wu and Eun-su take a trip to find sounds of nature for her radio show. The two become close and they spend a night together at Eun-su's apartment. Sang-wu finds himself falling fast and hard for Eun-su. But their relationship starts in winter, progresses through spring but begins to fall apart in summer. Eun-su, a divorcee, begins to feel pressured by Sang-wu. When he asks her 'how can love change?', she just tells him that she wants to break up. Sang-wu can't deal with the end of their love which he thought would last forever. Sang-wu travels to and from Seoul to Kang-neung unable to overcome his emotions and affection for Eun-su.