| english title | Hidden Floor |
| original title | 네번째 층 |
| aka | 어느 날 갑자기 두번째 이야기 (2), The 4th Floor, Forbidden Floor |
| year | 2006 |
| country | Korea |
| director | KWON Il-Sun - 권일순 | |
| actor | KIM Seo Hyung - 김서형 | Min-Ju |
| KIM Yu-Jeong - 김유정 | Ju-Hee | |
| JO Yeong-jin - 조영진 |
| genres | horror |
| duration | 92 min |
| distributor | CJ Entertainment |
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