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.

• EO Contents Group
• YERI
• Lee Chan-hyeong
• Suh Dong-hyun
• Oh So-hyun
• Kim Eun-bi
• Park Seo-yeon