A United States marshal in the Southwest learns of a Mrs. Osborne, whose son and husband have been killed by raiders and whose daughter, June, has been taken captive. He orders Jack Laramie, his best man, to investigate the affair and arrest the guilty parties at any cost. Jack arrives at the local cafe and learns the identity of the outlaw gang and June's whereabouts. Meanwhile, Jack has rescued a child whose parents have been killed while crossing the prairie to stake out a homestead.

King Calhoun comes to the aid of "Ma" Jackson, who is fighting to regain control of the family ranch after her husband's death. Her daughter, June, is desired by the ranch foreman, Pete Miller, who threatens revenge after his is fired.