Jack Bray is a wanderer in the wilderness of a Western town, governed principally by a band known as the 'six-o-one,' a gang of masked riders. While their original purpose was protection and not disturbance, they are temporarily under the direction of a degenerate, Jim Dougherty, keeper of the saloon.

The foreman of a cattle-ranch located on the Texas-Mexico border is the leader of a gang of alien-smugglers bringing Chinese immigrants illegally into the United States. An under-cover Texas Ranger is sent to investigate.