Macklin and his gang are causing problems in Colorado, Lieutenant Jerry Burke (Roy Rogers) is sent to track them down but only to find his brother commands them.
Roy is mistaken for a bad guy expected by the local outlaw gang. He goes undercover to pin the goods on the bad guys. Just as he is about to do so, the real bad guy shows up.
Roy returns to his hometown to make a radio appearance as a singing cowboy. There he finds himself in the middle of a war between sheep raisers and cattlemen.