Aspiring YouTuber Gi-ho stages a fake seance for viral content, but Ja-young joins, seeking her missing sister Seo-woo. In an underground cistern, Seo-woo volunteers as the "possessed," but when she collapses, terror unfolds. Trapped with sinister forces, the students face a deadly fate, leading to a shocking twist.
Direction
Son Dong-wan weaponizes tight spaces and dying phone batteries.
Acting
YERI's unraveling from skeptic to desperate sister hits hard.
Sound
The cistern acoustics will haunt your actual dreams.
Director
Son Dong-wan
Trivia, insights & behind the scenes
Korean horror's pivot toward influencer culture reflects real anxieties about mok-bang and cyberbullying scandals. The cistern setting evokes Seoul's hidden urban history.
KR
