On May 9th, a female high school student was brutally murdered. There are 7 suspects and 7 shadows that terrorize them. Who are they and which one of them is you?
| Actor | Role |
|---|---|
 Don LeeLeader of Shadow | Leader of Shadow |
 Kim Young-minOh Hyeon | Oh Hyeon |
 Lee Yi-kyungShadow 1 | Shadow 1 |
 Cho Dong-inShadow 2 | Shadow 2 |
 Teo YooShadow 3 | Shadow 3 |
 Ahn Ji-hyeShadow 4 | Shadow 4 |
 Cho Jae-ryongShadow 5 | Shadow 5 |
 Kim Joong-kiShadow 6 | Shadow 6 |
 Joo Hee-joongJeong Yi-se | Jeong Yi-se |
 Choi Gwi-hwaOh Ji-ha | Oh Ji-ha |
 Hwang GeonOh Jeong-taek | Oh Jeong-taek |
 Yoo Yeon-sooJin Ho-seong | Jin Ho-seong |
 Son Jong-hakByeon Oh-gu | Byeon Oh-gu |
 Im Hwa-youngJi-hye | Ji-hye |
| YYeon Ji-haeKidnapped High School Girl | Kidnapped High School Girl |
 Lee Na-raOh Ji-ha's Wife | Oh Ji-ha's Wife |
| SSin MinjuMrs. Jeong Lee | Mrs. Jeong Lee |
 Park So-damCoffee Delivery Girl | Coffee Delivery Girl |
 Kim Jae-rokManager | Manager |
 Kim Jong-gooMilitary General | Military General |