In the Old West, a Mr. Vane owns a locomotive that he wants transported by oxen-pulled freight line to Omaha.

Knowing that the expansion of railroads to the West will hurt his wagon-based freight line business, Ross plans to sabotage Vane's convoy to prevent the locomotive from arriving in Omaha.

Ross and his henchmen, Nat and Job, whittle down a wagon hitch pin which breaks and causes the locomotive engine to detach from the oxen.

Nat shoots two of the Sioux on their return trip in order to stir the tribe into attacking the convoy, thus preventing safe passage to Omaha.

Afterward, Ross demands the locomotive and other heavy equipment be abandoned and the convoy make its way to Omaha before the Sioux attack again.