A young woman visiting in Mexico is kidnapped by a gang of bandits, who drag her through the rugged wilderness to their hideout. She manages to leave word for her friend Bill, who knows the country well. But when Bill cannot find a horse, his only available form of transportation is his roadster. Nevertheless, he is determined to come to her rescue, even though it means trying to drive the car across miles of rocky, broken terrain.

The Light on Lookout Mountain is a silent adventure drama.