Saki Akehime, a student secretly involved with her teacher, Tsuguya-sensei, is lured into a dangerous trap by an impostor. Kidnapped by a group of ruthless criminals, Saki is blackmailed with a compromising video and subjected to a brutal gang assault. As she fights for her dignity, she is forced to maintain a facade of normalcy during a phone call with the real Sensei, who remains unaware of her nightmare.
Saki continues to suffer under the blackmail of a sadistic group, forcing her to endure further abuse to protect a secret. When her concerned friends, Mayu and Miku, follow her to a derelict church, they are caught in a cruel trap. The mastermind, driven by a vendetta over the death of his sister, forces Toya to watch as Saki and her friends are violated, turning a quest for truth into a nightmare of psychological and physical torment.