On Christmas Eve, ten strangers board a bus headed for Texas. At a remote spot on the road, the bus collides with a drug addict on a motorcycle, and a confrontation ensues. The addict's gang accomplice begins to use force against all the passengers, who take refuge in an abandoned compound. They improvise weapons to fight the lunatics, but as the number of casualties mounts, they realize their only way to survive is to do the most unlikely thing - attack the gangsters.