Min Young moves onto the fifth floor of a new studio apartment with her six-year-old daughter, Joo Hee. She’s concerned when her downstairs neighbor, Han Chang Soo, says that he cannot tolerate the noise above him, even though the two women live tranquilly. Furthermore, she is anxious about other residents’ strange behavior. Min Young hardens herself mentally after the move into the new house, largely because of her daughter’s unprecedented odd behavior and continual run-ins with a bizarre woman. Convinced that Joo Hee has fallen sick and perturbed by the mysterious events around the studio apartment, Min Young looks to uncover the truth by herself.
- Native Title: 네번째 층 - 어느날 갑자기 두번째 이야기
- Also Known As: Hidden Floor , 네 번째 층 , 어느날 갑자기 두번째 이야기 - 네번째 층 , Eoneu Nal Kabjagi Doobeonjjae Iyagi - Nebeonjjae Cheung , Nebeonjjae Cheung - Eoneu Nal Kabjagi Doobeonjjae Iyagi ,
- Screenwriters: Lee Jung Sun, Yoo Il Han
- Screenwriter & Directors: Kwon Ho Young
- Genres: Thriller, Horror