Overview
Ha-Jin (Yoon Jin-Seo), Yoo-Jin (Shin So-Yul), Tae-Suk (Kim Da-Hyun) and Kyoung-Chul (Lee Si-Yeon) all attended the same high school. Due to an unsavory incident, Yoo-Jin disappeared. 10 years later, these four people are now at the same place. The next day, Yoo-Jin, who is a budding novelist using the pen name of "Jin-Jin," is found dead. The other three are now suspects. Veteran detective Dae-Sik (Kim Min-Sang) tries to solve the case.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 33 | 45 | |
 | 31 | 43 | |
 | 28 | 40 | |
 | 30 | 42 | |
 | 25 | 37 | |
 | 45 | 57 |