After a poorly planned camping trip goes horrible wrong, three friends - sardonic, misanthropic Adam, the attractive but moronic Joey and psychotic stoner Sylvester - find themselves abducted by an incompetent alien force attempting to invade the Earth. Narrowly escaping with their lives, they (eventually) decide to investigate and try to stop the invaders, getting swept up in an epic battle of wits where all of the parties involved have very little wits to speak of.