Overview
Five members of the mountain bike club, Sangaja. To ride a mountain bike, we head to Chiaksan Mountain, where Min-joon's Uncle villa is located. After arriving at Chiaksan Mountain and enjoying the ride, strange things began to happen to the party…. And something unidentified chasing them! A desperate survival game for Sangaja's party to survive on Chiaksan Mountain begins.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 36 | 38 | |
 | 35 | 37 | |
 | 28 | 30 | |
 | 34 | 36 | |
 | 36 | 38 |