Movie contains the stories of three people: Suzuki (Toma Ikuta), Kujira (Tadanobu Asano) and Semi (Ryosuke Yamada). Suzuki is a former middle school teacher. His girlfriend was killed, which led him to quit his job and attempt to take revenge on her murderer. To do so, Suzuki has to infiltrate the underground world of criminals. Kujira is a contract killer for hire. He makes his targets fall into confusion and eventually commit suicide. Semi is a contract killer who uses the knife to take out his targets.

本来就读于贵族学校的铃木大地（山田凉介 饰）因为妈妈铃木海（铃木京香 饰）工作的原因，进而转学进入了以不良少年著称的海王工业，就读一年级。本应该是叛逆的年纪，讨厌妈妈在身边束缚的大地，却是比起任何东西都要喜欢自己的妈妈。为了成为妈妈眼中理想的儿子，大地努力达成一百分，学习成绩优秀、性格完美，总之是一等一的好孩子。而作为妈妈的海，则是一直伪装成好妈妈的形象，其实内心是希望优秀的儿子将来能为自己买上一栋带庭院的房子。 奇异的母子俩就这样相依为命的走了过来。而大地最害怕的事情是有第三人出现夺走自己的妈妈，于是开始了和母亲身边的各色男人进行大作战……