Overview
Min Ji-Won suffers from amnesia caused by an accident almost a year ago. After the accident, Min Ji-Won is a shy person. Prior to the accident, Min Ji-Won was the leader of a gang of four girl bullies. Through pictures, Min Ji-Won learns about the three other members and she wants to learn what happened to them. While Min Ji-Won attempts to unravel the mystery, her former friends are killed one by one.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 26 | 47 | |
 | 31 | 52 | |
 | 20 | 41 | |
 | 20 | 41 | |
 | 25 | 46 | |
 | - | - | |
| - | - | |
 | 48 | 70 | |
 | 48 | 69 | |
 | 20 | 41 |