Morgan Starr and Randy Benton ride a long way to the Dakotas to sell a herd of cattle for the consumption of an Indian tribe. Starr planned to sell 3000 head but the crooked, heartless Indian agent Harry Weatherby will only buy 500 head. One of the older braves High Sun had left the reservation illegally but when he saw a herd of buffaloes, he returned to tell the other braves who see it as a sign of life. Bowers, son of a Comanchero, who brought back High Sun is told by Weatherby to prevent High Sun from talking to anyone. The young brave Tonka and his father Two Hawks ask Morgan to help them talk to High Sun. After High Sun reveals the existence of the buffalo herd, the braves rejoice. The two men become embroiled in the local tribe's problems when Two Hawks and Tonka steal Morgan and Randy's horses as well as Morgan's saddle. After buying new horses from Weatherby who puts a $100 bounty on the heads of the two Indians, they track them to the herd of buffalo. Along the way they are aided by the widow Margaret McKinley who like Morgan but unlike Randy understands the Dakotas. The buffalo - long since disappeared from the plains - is portentous for both men.
—heathentart