Guimoon: The Lightless Door (2021) Korean Movie

In 1990, a janitor at a training center in Guisari murders guests and then himself. Since then, annual suicides or accidents occur there, leading to its closure. The abandoned center is rumored to be haunted, with a mysterious guimoon door where people enter but never leave. Do Jin, a psychic research institute director, investigates the center to uncover the truth about his mother’s death during an exorcism there. Meanwhile, university students Hye Yeong, Tae Hun, and Won Jae visit the center to film a video for a contest.

Native Title: 귀문
Also Known As: Gwimoon: The Lightless Door , Gwimun , Gwimun: The Lightless Door