A bunch of city slickers from different backgrounds go into the wild mountains to be one with nature, but basically to have a good time. However, a paramilitary group has chosen the same time to go camping. When one of the soldiers thinks their boss has been killed by one of the city slickers, he coaxes his team into exterminating all of them. They will have to rely on their wits and on each other in order to survive.

故事围绕着一种在街头被称作“Soy Sauce”的毒品展开，传说，此种毒品的使用者可以获得极其美好的迷幻体验，但相应的，它也会让沉迷者变得“非人类化”。此时，一个无声世界的入侵也在悄悄的进行，人类需要一个新的英雄。而责任似乎落在了John和David，这对仅有个糊口工作的大学生身上。他们能够阻止恐怖的降临并拯救人类么？不，不，他们不能。