The Ghost Game (2025)

Gi-ho, an aspiring YouTuber, orchestrates a phony seance to grab attention online, but things take a turn when Ja-young arrives, desperate to find her sister Seo-woo. In a hidden cistern, Seo-woo steps in as the "possessed" participant, but when she suddenly collapses, chaos ensues. The group soon realizes they are ensnared by malevolent forces, facing a life-threatening ordeal that culminates in a startling revelation.