Gu Bong-seo and Kim Hui-gab are good buddies. Bong-seo has no where to go, so he lives at Hui-gab's place. Naturally, Hui-gab often gets into quarrels with his wife, and Bong-seo gets involved to help them reconcile. One day, Bong-seo wins a lottery. He saves Hui-gab from the financial trouble and returns to his hometown with the rest of the money.

In the spring of 1999, a group of old friends gather to celebrate their 20 year reunion. Among the group is Yeong-ho, a cold, unhappy man, whose demeanor puts a damper on the festivities. The seriousness of Yeong-ho's depression becomes apparent when he climbs a railroad bridge and looks like he might jump. At this crucial moment, memories of seven crucial episodes from Yeong-ho's past flood his mind.

The story is set in the 1970s during the period of military dictatorship. Schools were frequently closed and society seemed to face bleak prospects on all fronts. Nonetheless, Byung-tae, a college student, enjoys pursuing romance in blind group dates. It's during one of these ventures that he meets Young-ja, a French literature student.

Two school troublemakers decide to become better students. They visit their suspicious teacher everyday after school to ask questions and offer help. When their teacher falls ill due to overwork and is hospitalized, they decide they must find a way to show their appreciation.