An old-fashioned western, King of the Wild Stallions features a pretty widow in distress, a handsome foreman who comes to her rescue, and a nasty landowner. Martha (Diane Brewster) is troubled because unless she can come up with $500 she will lose her land to Matt (Emile Meyer), a wealthy cattle rancher. Coincidentally, Matt is offering a $500 reward for the capture of a powerful wild stallion, and anyone who can add knows that Martha has a way out of her dilemma. But at the same time, Martha's son Bucky (Jerry Hartleben) wants to keep the horse if he can catch him. Caught between her son's wishes and losing her land, Martha may have a way out, thanks to Randy (George Montgomery), her ingenious, talented, and good-looking foreman.