Joo Hyeok and Joo Yeon spend an ordinary but happy day with their parents who run a small snack shop. One day, Joo Yeon goes missing with the news that a murder has occurred, and the more Joo Hyeok chases after the disappearing traces, Joo Hyeok faces unknown truths.
| Actor | Role |
|---|---|
 Min Do-heeJoo Yeon | Joo Yeon |
 Kim Dae-gunJoo Hyeok | Joo Hyeok |
 Kil Hae-yeonNot listed | Not listed |
 Park Seo-eunNot listed | Not listed |