A staircase leading to the dormitory of a remote boarding school usually has 28 stairs, but every so often there appears to be 29. When someone steps on the mysterious extra stair, the horror begins.
Trailer
Cast
JY
Jae-yeon Yun
Director
Song Ji-Hyo
Yun Jin-seong
Han-byeol Park
Kim So-hee
AJ
An Jo
Eom Hye-joo
Ji-Yeon Park
Han Yun-ji
Moon Jeong-Hee
Dance Teacher
JK
Ji-min Kwak
Dance class junior
JL
Ji-Yeon Lee
Radio DJ
Kong Sang-Ah
Kyoung-Jin
SH
Su-a Hong
Sculpture club member
SL
Shin-ae Lee
Writer
SL
Soyoung Lee
Writer
YL
Yong-Yeon Lee
Writer
KS
Kim Soo-ah
Writer
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Comments
4 Comments
Angela 👼🏽Nov 25, 2025
ATTOUKORANov 25, 2025
The RockNov 25, 2025
Safaesouri12🧸✨♥️Aug 9, 2023