Guimoon: The Lightless Door (2021)

In 1990, in a training center in Guisari, a building manager killed the guests and committed suicide. Since then, it became a place for suicides and there were also fatal accidents, so the training center closed and was abandoned. Many ghost stories are told about what they call 'Guimoon' a door where people enter, but do not come out of. Meanwhile, Do-jin (Kim Kang-woo), the director of the Psychic Research Institute, went to the training center to find out why his mother died while attempting a ritual; college students Hye-yeong (Kim Sohye), Tae-hoon (Lee Jung-Hyung) and Won-jae (Hong Jin-Gi), went to the center to record a video for a contest, were horrified facing a strange horror. If you can bear it, try to open 'Guimoon'.