A cowboy and a bandit face off over possession of a valuable mine.

A returning Korean War vet becomes embroiled in a fight over possession of a tungsten mine.

O'Brien is "Whispering" Smith, so named because he speaks softly but knows how to fend for himself. The son of a railroad president, Smith is determined to learn the business from the ground up, so he gets a job as a track walker for his dad's rail line. While going about his duties, he meets Nan Roberts (Irene Ware), who is about to sell her Colorado ranch. Smith finds out that there are valuable tungsten deposits on her land and makes certain she won't be cheated by the villains

During the Second World War, the Allies threaten to attack Spain, an allegedly neutral country, if the Francoist regime keeps allowing Nazi Germany to extract Galician tungsten, a strategic mineral, paramount to the war effort.