In an all-boys school, a class of 12th grade students are in disbelief after doing a seance that revealed the presence of a ghost lurking among them. Soon their doubt turns into suspicion as the class runs into eerie events that compel them to deduce the ghost's identity.
| Directing | Ha Han-me | Director |
| Writing | Han Song-yi | Screenplay |
| Production | Jung Da-bin | Producer |
| Production | Kim Hwi-hwan | Producer |
| Production | Song Yoon-geun | Producer |
| Editing | Kim Jung-min | Editor |
| Production | Lee Hae-ri | Line Producer |
| Production | Yang Ji-hoon | Executive Producer |
| Sound | Baek Jong-sung | Music |
| Sound | Kim Hye-jin | Music |
| Sound | Kim Se-jong | Music |
| Sound | Seo Jung-hyuk | Music |
| Crew | Choi Byung-hoon | Cinematography |
| Crew | Yoon Goo-hee | Cinematography |
| Art | Kim Hyun-ji | Art Direction |
| Costume & Make-Up | Jung Min-jung | Costume Design |
| Costume & Make-Up | Yeom Hee-soo | Makeup Department Head |
| Editing | Jeon Min-ah | Assistant Editor |
| Sound | Choi Hyun Suk | Music |
| Sound | MGNTK | Music |
| Sound | Q | Music |
| Sound | Edle | Music |
| Sound | Modo | Music |