Lightning Bill Lewis sets out to capture Gómez, the leader of a ruthless gang that has been tormenting a border town. He prevents Gómez from kidnapping his girl, Mary, but Gómez escapes. With the aid of Captain Duerta, Lightning Bill pursues the gang, and when it is captured by Mexican soldiers...
When a bank is robbed, the cashier is killed and suspicion for the murder unjustly falls on Jim Marden. He gives himself up, and his brother, Wally, promises to run down the killer. Wally, who suspects Mike Wesson, the foreman of the Flying X Ranch, of the crime, goes to the ranch and talks to him....
