A group hires a guide to take them whitewater rafting down the Zambezi River in Africa, but what they don't know is that the guide is actually a deranged psychotic killer.

Lenny Brown moves to California to find his fortune in tax shelter investments. When the federal government changes the tax laws, poor Lenny finds himself $700,000 in hock with nowhere to turn. His friend, Joel, introduces him to cocaine to give Lenny that needed "boost". What ensues next is a descent into drug addiction and insanity as Lenny tries to regain control of his life, all the while needing that extra "boost".

山姆·迪兹是一个冷酷无情的警察，他试图在最后一部冷酷无情的电影中讲述一个连环杀手袭击他的家庭的故事。他还在努力寻找这座城市的新杀手。格里高尔是一个不屈不挠的爱国者，他试图为家人的死报仇。他追捕那些负责任的人，并逐一执行。在这个关于猫和老鼠的暴力故事中，这两个男人学会了互相理解，甚至互相尊重。