战国时代，有八位武士带著三千两黄金来到一个破落村庄，却惨遭利欲薰心的村民们杀害，许多怪异事件因而接连发生，人们便称这个村庄为“八墓村”。曾带领村民攻击八位武士的田治见庄家的子孙在疯狂地残杀三十二个村民后，行踪成谜。二十几年后，“八墓村”彷佛被下了魔咒一般，再度演出惊悚杀人事件。该村大财主田治见家的弃儿辰弥（藤原龙也 饰）被律师从东京招回村里继承田家的财产。辰弥回到家乡受到双胞胎的外祖母以及重病的哥哥久弥的欢迎，可是对传说总有一种不安感。然后，传说被说中了。先是哥哥被毒死了，后来，村里不断有人神秘死亡，于是重新流传对武士幽灵的恐惧。侦探金田一耕助（稻垣吾郎 饰）被请进村来调查此案。

A married woman, Kazuyo, enlists the services of the private detective, Rokusuke, to see if her husband Norio is cheating. Kazuyo says whenever her husband cheats on her, he then comes home and has sex with Kazuyo, to hide it. However, since her husband broke up with his mistress, her own sex life has taken a big hit. In her frustration, she seduces detective Rokusuke. Soon after that, Norio starts cheating again - this time with another woman. The woman bears a striking resemblance to detective Rokusuke's wife. Now, he's faced with a difficult choice.