John Milford (Pinto) plays the bossy older brother of Tom Simcox (Curly), who is in love with the town tramp, Margaret Blye (Karen). Karen is in love with Curly's money, because he just sold a herd and has $18,000.00 in his saddle bags. $18,000 in 1870 is worth $401,628.09 today.
Curly does not want to give it to his brother to put in the bank, so he has this money in the saddle bags of the horse for a few days. It would have been an interesting twist if Karen had ridden off with the horse and the money to Tascosa, so that Relco (H. M. Wynant) could fight the two brothers for the money.
Unfortunately, what happens is that Karen keeps winding up Curly about his brother Pinto, and eventually that leads to mayhem and murder. Marshal Dillon is on the trail, with Festus behind him. Tascosa has lots of bad guys planning to rob and kill Curly, and Karen quickly betrays him.
The ending of this story had some gun-fighting action, but it should have gone further. Curly was about to kill Karen, and she deserved it.