When he catches wind that bookish George Parradine (John Eldredge) is actually a ruthless outlaw who’s had one man killed and is now trying to steal a fortune from another, U.S. Marshal Rocky Lane (Allan Lane) poses as a bandit and infiltrates Parradine’s gang. But Rocky’s quest for justice is jeopardized when the dead man’s son (George Nader) also goes undercover to get revenge on his father’s killer. Fred C. Brannon directs this 1950 Western.
The Jewel Land Company of Elko, Texas is selling Government land to settlers. Before any of the settlers can claim their land, they are being killed by McCabe’s gang. When Rocky comes to Elko to find his friend Jim, he winds up in Jail on a charge of stealing money from the new Marshal. The only person in town that is on his side is Nugget, but there is little that he can do by himself. When Rocky escapes from the jail with another prisoner and the Marshal is shot, he has to find who is behind his problems and what has happened to Jim and Emily.
Cowboy Rocky Lane (Allan Lane) thwarts an attack on a courier delivering a precious Indian tribal belt and becomes embroiled in a conspiracy in the process. When the courier dies, Rocky delivers the belt to the Agent. But he quickly finds himself arrested for murder and learns not only is the belt missing, but the murdered Agent is not the man he gave the belt to.
A man is sent to jail for murder escapes while being transferred, Rocky is sent to bring him in. When he catches him in a ghost town the man claims to be innocent and was trying to clear himself by finding the stolen money that was never recoveded at the time of the killing. But then they find themselves prisoners of an outlaw gang that is also after the money.
After being hit by rustlers, a group of Montana ranchers asks the governor to send state rangers for protection. State Ranger Rocky Lane becomes involved in a mystery surrounding a gang of horse rustlers and a young rancher who is blamed falsely for a killing. Lane helps uncover the real killers and unmasks the ringleader of the rustlers.
U.S. Marshal Rocky Lane (Allan Lane) arrives to help his friend Nugget (Eddy Waller) whose shipments are being robbed. Learning the gang only goes for incoming shipments, he figures they are repacking the loot and having Nugget ship it out. So he hijacks the next outgoing shipment finding a box labeled tools contains gold bars. Then posing as an outlaw he makes a deal with the gang hoping to round them up. But the boss learns he is a Marshal and he is made a prisoner.
The cattle that are being rustled apparently vanish as no one is able to find them. But Rocky Lane, in his last B western, is on the job and he is assisted as usual by Nugget Clark.