The teenagers Marcus, Liz, Craig and Nina are camping in the remote outback of Australia. While driving on the road, a road train crashes on their car that leaves the road in a serious accident. The quartet survives and Craig breaks his arm, but their car is totally wrecked. However they see the train truck parked on road and Marcus and Liz walk to the vehicle to ask for help. They do not find the driver and soon Craig and Nina arrive. When they see the driver shooting at them, they decide to carjack the road train. Soon they begin to act strange possessed by some evil force.