Their friends want to throw Jeremiah and Cindy the ultimate bachelor and bachelorette parties. So the girls head to an isolated mansion in the middle of nowhere with no cell phone service, collecting a stray dog along the way. The guys, led by daredevil Kyle, and accompanied by CIA officer Martin, head to Vegas for a weekend of extreme activities that no one wanted. As things skid out of control, both groups are left struggling for survival and facing danger at every turn.