In 1990, a janitor, working at a training center in Guisari, murders guests and then kills himself. Since then, suicide or accidental death has occurred at the training center every year. This led to the training center being shut down. The training center has been abandoned for years. A guimoon, a door used only by ghosts, rumor, related to the training center spreads. The guimoon rumor is that people go into the training center, but nobody leaves the training center. Do Jin is a director of a psychic research institute. His mother died, while she was doing an exorcism at the training center. He goes to the training center to search for answers about his mother's death. Meanwhile, 3 university students Hye Young, Tae Hoon, and Won Jae go to the training center to film a video for a contest. (Source: AsianWiki)