在这部厕所里的花子剧情/惊悚/犯罪片中,因母亲引起了严重的伤害事件，外表清纯、性格和善的柊花子（池上花衣 饰）转学来到一所破旧的中学。也许是她逆来顺受的样子，结果很快引起二年C班山本爱、熊谷奈菜、平野叶月三个同学的欺凌。随着家庭背景被山本等人获知，欺凌程度不断升级。她的级任老师吉冈彩（おかもとまり 饰）虽有心干预，无奈同僚皆出面劝阻，要尽可能和学生保持距离。在这冷冰冰的当下，只有班上一名男孩愿意挺身保护花子。
某天，叶月意外进入花子的记忆，目睹了花子母亲杀害父亲的全过程，而叶月也从此宣告失踪。诡异事件并未就此结束，名震全国的超都市传说“鬼娃娃花子”的故事，由此上演……
Hiiragi Hanako transferred to a junior high school. She was bullied by Ai, Nana and Hazuki and her secret had leaked out. She was the sole survivor from the family massacre case. While Yoshioka Aya a class teacher tried to stop bullying, Hazuki went missing. Hanako was suspected of being the criminal, but Ryouta a classmate spoke up for Hanako. And Nana disappeared.
