Finding himself out of funds, cowboy Dick Rainboldt accepts a job from an employment agency which sends him to the Torpedo mine in San Clemente. En route, he meets Katie Wigfall and is immediately attracted to the girl. Upon his arrival, Dick is amazed to discover that he has been employed as a strikebreaker, but determines to see the job through even though he disagrees with its objectives. Upon learning that the owner of the mine is being misled by his manager and superintendent, Dick determines to rectify the situation. After accepting money from the conspirators to blow up the mine tunnel, Dick uses the incident to expose the plotters, winning for himself a hefty promotion as well as Katie's love.