Round-Up Time in Texas

Cowboy Gene Autry and Frog Millhouse transport a herd of horses to Dunbar, South Africa, at the request of Autry's brother, Tex. Unknown to Autry, diamond miner Tex and his partner, Barclay, have run afoul of saloon owner John Cardigan, who wants to take over their mine. Tex disappears after Barclay is murdered, just as Autry and Millhouse reach Dunbar. The men grow suspicious when they can't find Tex and take their investigation into the jungle with the help of Barclay's daughter, Gwen.