A boy who can see ghosts moves to a small town, where he befriends a female ghost. The two work together to investigate a masked ghost who is murdering students one by one.
| Actor | Role |
|---|---|
 Kang Ha-neulIn-su | In-su |
 Kim So-eunGhost Girl | Ghost Girl |
 Kim Jung-taeSeon-il | Seon-il |
 Han Hye-rinHyun-ji | Hyun-ji |
 Park Doo-sikHae-chul | Hae-chul |
 Ju Min-haNa-ra | Na-ra |
 Joo Ah-reumSung-hee | Sung-hee |
 Kwak Jung-wookKi-tae | Ki-tae |
 Park Choong-seonSe-he's Father | Se-he's Father |
 Lee Ah-hyeonTeacher | Teacher |
 Oh Youn-hongAh-young's Mother | Ah-young's Mother |
 Lee BomHye-jung | Hye-jung |
 Yoon Chan-youngYoung In-soo | Young In-soo |
 Yoon Yeong-geolDetective Jung | Detective Jung |
 Park Geun-cheolStudent | Student |
 Lee Jung-chulTeacher | Teacher |
 Kim Jae-hwaGhost | Ghost |
 Gyeong Su-jinReversal | Reversal |
 Jung Ga-eunTeacher | Teacher |
 Ahn Sang-taeAhn Sang-soon | Ahn Sang-soon |
| KKim Sang-hyeokElementary School Vice Principal | Elementary School Vice Principal |