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.

Oh Sung-Chul has been released on parole. He wears an ankle bracelet that monitors his movements as well as reminding himself of his horrifying past deeds. Sung-Chul lives in an apartment complex about to be demolished. He loses his construction job and is screwed over for half of his last paycheck. He takes medication to suppress his urges. Kim Hyung-Do is a religious family man who runs a printing company. The printing business is going through hard times. Kim Hyung-Do also goes through heavy emotional turmoil due to a horrendous crime inflicted upon his daughter by Oh Sung-Chul. On a fateful day, Hyung-Do spots Sung-Chul out on the street.