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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.
as Jjang-gu
as Choon-bae
as Detective Cha
as Bok-soon
as Chief Jang
as Teacher Kim
as Yoon-bae
as Young Ok-hee
as Chief inspector
as Gang
1969
1974
2008
2023
2009
1977
1955
2011
1941
2022
1986
2018
1982
