In a small rural town, a brother and sister goes missing and there's also a serial killer case involving woman as the victims. Mayu Misono (Aya Omasa) is a sophomore high school student in the town. She is called "Ma-chang". When Mayu Misono was young, she was also kidnapped and locked up. Since that time she has been traumatized and has become indifferent to everything around her. One day, in front Mayu's mansion, her childhood friend Mii-kun (Shota Sometani), who was kidnapped with Mayu, suddenly appears. Ma-chang hugs Mii-kun. Up until now, she has waited for Mii-kun. Mayu has lived in the mansion alone, until a week ago, when she kidnapped two elementary school aged kids and has kept them locked in her mansion. To hide Mayu's crime, the four of them will live together in the mansion. The truth of what happened 10 years ago becomes slowly revealed. The reason Mi-kun tries to protect Mayu, even puts his life at risk, all connects to an unexpected real criminal.

御园麻由（大政絢 饰）是一个美丽但是性格有些孤僻怪异的女孩，在学校里她绝少和人交流，终日独来独往，行踪神秘。这一日，一名俊秀的男孩找到了她，这个被麻由称作“阿道”（染谷将太 饰）男孩给她带来了无尽的欢喜。在此后的一段日子里，阿道住进麻由的公寓，二人同吃同住，亲密无间，俨然一对未曾经历分秒分离的情侣。偶然的机会，阿道发现麻由的房间内竟然藏着两个全身被捆绑起来的小孩，而他们正是今日新闻热炒的失踪幼童。这一切不可避免地勾起了阿道和麻由所共有的悲伤回忆，他们童年时似乎也曾被人绑架，并遭遇过非人的耻辱虐待，童年的遭遇在各自心中留下难以抚平的伤痕……

みーくん（染谷将太）とまーちゃん（大政絢）は幼なじみで、10年前の誘拐監禁事件の被害者同士。小学生姉弟の失踪事件と謎の連続殺人事件が同時に起こっている街で、二人は10年ぶりに再会する。いまだにトラウマを抱えていた二人は心をかよわせるが、まーちゃんは乱暴でワガママで、どこか壊れた女の子だった。そんなある日、まーちゃんを主治医の精神科医（鈴木京香）に連れて行ったみーくんのもとに、事件を捜査する刑事が訪ねてくる。どうやら二人は事件の容疑者と疑われているらしい……。