Jasper Palmer

U.S. Marshals Nevada Jack McKenzie and Sandy Hopkins are working undercover to capture a gang stealing horses from the Navajos, and to capture the killer of a Ranger. Nevada poses as an outlaw to get in with the gang and find the leader, while Sandy pretends to be a drunken old horse thief that has knowledge of where the Navajos have hidden their ponies.

Driving a herd of cattle to market, Jimmy finds the trail has been fenced off by an old friend of his. While the two sides try to settle the matter peaceably, a man from each outfit get together to try and start a range war between them figuring they will end up with the cattle. When cattle are rustled, Jimmy finds the clue, horses with shoes that make tracks that look like cattle.

Jimmy and partner Dusty have bought a ghost town in the Cherokee strip. When they arrive they find their other partner Lasses has sold 51% to four crooks.

A fancy masquerade party is the scene of a jewel robbery, and later several suspects in the robbery are discovered to be aboard the same train.

Jimmy Wakely wishes to sell to the government a group of wild mustangs which he has captured and trained for rancher Matt Blake. The competition is Flora Carter, the owner of a near-by ranch. The army colonel in charge decides to buy the winning horses of a cross-country race. Flora has her henchmen, led by Sam Phelps resort to foul means in order to try to win the race.