The Fighting Buckaroo

A former gunslinger is forced to take up arms again when he and his cattle crew are threatened by a corrupt lawman.

Following the Civil War, headstrong rancher Thomas Dunson decides to lead a perilous cattle drive from Texas to Missouri. During the exhausting journey, his persistence becomes tyrannical in the eyes of Matthew Garth, his adopted son and protégé.

Don Diego is a large ranch owner, the uncle of Dolores and the guardian of a young American, Steve Randall. Steve has just delivered a large herd of cattle to the ranch, where Don Diego has just found out that he must pay the local tax commissioner, Harkness a fine for unpaid taxes on a herd of over one-thousand cattle. Steve offers to drive the cattle to the commissioners office, even though he fells the fine is unjust. Arriving at the office, Steve learns that Harkness (who he has never met), who has a reputation for dishonesty, is out. Dropping by the cantina, Steve gets into a fight with Harkness, and Harkness swears vengeance on Steve, especially after Steve stampedes the cattle through the town.

The local school is causing Hoppy problems. First Bar 20 cattle are stolen when Hoppy investigates a problem there. Then the new teacher arrives and disrupts the routine of the Bar 20 hands. Later with the Bar 20 hands at graduation, the rustlers are poised to strike again. But there is dissension among them and this will lead to the break that Hoppy needs.

Disguising himself as a milquetoast Easterner who writes Western novels, Hoppy enrolls in a dude ranch in order to unmask the murderer of the owner's husband.