When three nuns come into Dodge looking for the father of two small children, they are surprised when the father turns out to be an ornery self-centered old mountain man.

As Matt escorts a wounded prisoner to Ft. Union, his camp is invaded by a thieving young boy, whom Matt takes into custody. In Dodge City the journey to Ft. Union is joined by two women, one pregnant traveling to see her husband, the other secretly the wife of the prisoner. A trio of outlaws waits on the trail to kill Matt and rescue the prisoner.