远离尘嚣的一座封闭谷仓内，安娜（劳拉·范德沃特 Laura Vandervoort 饰）、赖安（保罗·布朗斯坦 Paul Braunstein 饰）、米奇（曼德拉·范·皮布尔斯 Mandela Van Peebles 饰）和卡莉（布列塔尼·艾伦 Brittany Allen 饰）从昏迷中醒来。他们的头部被奇怪的装置束缚，颈上的铁链连接着安装了圆锯的铁门。在竖锯的指示下，他们将经历一场场痛彻…
When recent college graduate Manny has trouble making ends meet, his father-in-law offers him a job evicting delinquent tenants. Manny soon finds himself unleashing a karma demon which stalks him at every turn.
