Full of road-weary travelers with secrets to keep and lies to tell, a gritty tour bus follows a sun-baked desert highway. But one fiendish spirit rides among them with a brutal plan to cull the passengers, one life at a time. Making their way through the jagged mountains and brutal stretches of sand along Devil's Highway, they turn on each other as despair and terror overtake them until only a few remain in this disturbing tale of survival.
