Guimoon: The Lightless Door (2021)

Enter the creepy corridors of an abandoned community center where, in 1990, a custodian perpetrated a massacre claiming the lives of all the guests. Do-jin, director of the Psychical Research Institute, and college students Hye-young, Tae-hoon and Won-jae are drawn inside, opening a door to darkness. They will face eerie horrors bridging the realms of the living and the dead, as secrets surface, an evil force craves more than echoes, promising a hair-raising journey through the sinister past.