Four young friends on a camping adventure in the outback are chased and deliberately run off the highway by the Road Train - a massive and unrelenting two-trailer truck. Stranded amongst the wreckage of the near fatal crash, their only option is to approach the Road Train, now standing parked in the near distance. But the drivers seat is empty and the truck appears abandoned. When gunshots break the silence they commandeer the monstrous vehicle and take to the road. They soon discover that what lies inside the trailers will prove more terrifying than anything they've experienced. The next town is only three hours away, but the next town is somewhere they might never reach.