A horror webtoon writer journeys to a shabby apartment building in search of ideas. The building's caretaker tells him about multiple strange events that happened throughout the building's history.

Da-kyung, a horror YouTuber desperate for views, uploads a video about the eerie urban legends surrounding Gwanglim Station—the site of the highest number of missing person cases in the country. The video goes viral overnight. Despite everyone's warnings, Da-kyung's thirst for views only grows stronger. But as she digs deeper, she uncovers a shocking secret behind the station…