About the title
After buying an old used trailer, a well-off American family sets off on a weekend trip into the backcountry to see cave paintings. Strange things start happening with the vehicle on the road. Eventually, after losing its brakes, the camper comes to a stop. One person dies as a result of the accident. But the death toll doesn't end there. Upon learning that the trailer they bought once belonged to a serial killer, the survivors try to escape it.
