Guns along the Gila

When he finds the struggling Wheatley family trying to make it by themselves through troubled Apache territory of the Sonora Desert, army scout John Best is turned down in his offer to guide them and the Apaches strike first. Now Best finds himself helping the teenager Lucien to rescue his sister Emma from a terrible fate. However the US Cavalry, under a demented newly commissioned officer, seems to be determined to complicate matters instead of riding to the rescue. It's all down to Best to fight his way through despite the odds.