When he finds the struggling Wheatley family trying to make it all by themselves through troubled Apache territory of the Sonora Desert, army scout John Best begs them to wait for him to guide them. But they set out on their own and the Apaches strike first.Now Best finds himself helping the teenager Lucien to rescue his beautiful 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.