Sierra Nevada Jones (Barbara Stanwyck), a feisty young woman, attempts to stake her claim in the cattle business despite threats from greedy land grabbers and their hired killers. Undercover agent Farrell (Ronald Reagan) comes to her rescue, even though he is in the midst of a separate investigation to find out who s been provoking the local Indian tribes into attacking the whites. Cattle Queen of Montana is beautifully filmed on location at Montana s Glacier National Park.