The tale of two former Texas Rangers who leave the South Texas town of Lonesome Dove on an epic 2500-mile cattle drive to the lush ranch country of Montana. From the re-created towns to the vast plains to the expansive cattle drive and heart-stopping stampede, it is an inspiring and enlighting experience, certain to change your views of our American heritage.

A cattle rustler clad in black leather intends to run a stolen herd to Hell's canyon. But first he must pass through Rock River, a town plagued by prejudice and corruption, but presided over by the tough but fair Sheriff Brandon. When a man is lynched so that his ranch can be taken, Brandon faces down not only the cattle thief but his own townspeople, in a tireless effort to uphold the law.

Gary Cooper plays Lex Kearney, a U.S. Army major posing as a Confederate sympathizer. Kearney's ruse unmasks rustlers of Union horses, even though his true allegiance is revealed. Ultimately, the major and his troops are outmanned and outgunned. But with the experimental weapon that makes one man the equal of five, they won't be outfought.