One day, 25 years ago, missing Chun-bae's letter is delivered to his cousin, Jjang-goo. The letter contains Chun-bae's lover, Bok-soon, and other people's letters. Jjang-goo finds Bok-soon to deliver the letter and meets class president Jang together. The three people recall their memories from 25 years ago, and eventually faced the person who sent the letter. Through that, the tangles begin to unravel.
- PUAN VER
Künye
- InanYönetmen, Senaryo
Seo Hyun-wooJjang-gu
Han Sa-myeongChoon-bae
Seo Jin-wonDetective Cha
Yoo Ji-yeonBok-soon
Kim Dae-jinChief Jang
Im Ho-kyoungTeacher Kim- No Si-hongYoon-bae