On the final day before summer vacation, Kenta receives an enigmatic note that draws him to the long-abandoned school building after hours. Upon arrival he finds a small group of classmates and instructors who have been summoned by identical messages, and their suspicions about a possible prank quickly turn to confusion. Suddenly the entrance is sealed from outside, and the situation darkens as several of the women vanish one by one, the first disappearance followed by a disturbing video that reveals the true nature of their confinement. What began as idle speculation soon spirals into a harrowing night of fear and unexpected intensity.
