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.