The Reno brothers are wanted men! After years of murder, robbery and terrorising the inhabitants of a small western town, the citizens have had enough and send for outside help. It arrives in the shape of James Barlow (Randolph Scott), a law-enforcement officer sent to infiltrate the Reno gang and bring them to justice. Barlow poses as an outlaw to gain the confidence of the crooked town officials and the Reno gang. Events soon turn nasty when Barlow sets up the gang in a dawn train robbery but all doesn't go to plan.