Twenty years ago at the infamous Redwood Farm, the owner went mad and killed his family and himself. Shrouded in urban legend ever since, a stranger obsessed with the unsolved Redwood murders convinces a group of bereaved family members to venture into the wilderness in the hope of proving the existence of the notorious burlap bag-masked maniac. Their quest for truth sees a sinister turn of events, as the hunters become the hunted and a blood-soaked fight for survival ensues when they find that the sinister tales told of the axe-wielding psycho farmer are very real indeed.
Marty（柯林·法瑞尔 Colin Farrell 饰）是一个爱喝酒的电影编剧，他的好友Billy（山姆·洛克威尔 Sam Rockwell 饰）则和Hans（克里斯托弗·沃肯 Christopher Walken饰）靠偷狗然后把狗还回给失主来赚钱。Marty近期在写 一个叫《七个神经病》的剧本，却没有什么灵感，于是Billy给他提供了一些素材。有一个神经病是一个杀手，每次杀完人都会扔下一张J扑克牌，有一个越南的复仇者，有一个自刎的贵格教徒....Billy偷了一条狗，这条狗是一个黑帮老大Charlie（伍迪·哈里森 Woody Harrelson 饰）的爱犬。Charlie丢了他视如生命的狗，到处在寻找。他找到了Hans住院的妻子并杀害了她。Billy知道这件事后，愤怒的将他的情人杀害，而她也是Charlie的情人，随后Billy扔下了一张扑克牌。原来Billy就是那个神经病杀手。他和Marty、Hans来到野外继续写剧本，同时他也让Charlie单枪匹马前来决斗.....
