Ayumi, an honor student offered a chance to study abroad, attempts suicide after a teacher confronts her with an incriminating school report. Rescued by a secret detective, she resolves to become an investigator herself. Infiltrating her school, she uncovers a sinister organization operating within, with the school's principal as the mastermind. But she soon finds herself trapped in a brutal human trafficking ring conducting violent physical experiments. Amidst the twisted conspiracy between the school and criminal forces, Ayumi steel herself to survive and fight back.