Lawman John Brown (Harry Carey), posing as a notorious outlaw named Jim Blake. goes undercover after a mysterious killer and gang leader, known ad the Night Rider, who leaves a trail of violence , robbery and murder in the border area of Texas. Along the way he is accused of being the Night Rider. He breaks jail and, while avoiding capture, manages to trap the renegades and identify their leader in a surprising way.
—Les Adams <longhorn1939@suddenlink.net>