 U.S. Marshals Nevada Jack McKenzie (Johnny Mack Brown) and Sandy Hopkins (Raymond Hatton) 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.