Having masterminded the hold up of his company office, a mining engineer is barred from the industry. He then sets up shop as an assayer, scheming to acquire a rich silver mine lease from its operators.

A mining engineer teams up with a crusty deputy sheriff to solve the mystery killings at an old mine where the owner's family waits for him to die, and where a valuable radium strike may have been made.

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