Tom Allen is a U.S. Marshal working undercover in order to apprehend an outlaw gang that is robbing the mail. A great thing about this movie is Glenn Strange gets to play a good guy (Sheriff Big Bill Collins) for a change. Or is he? There are a few things that put Tom’s true identity in danger of being discovered and there is a lot of tension built up because of this. Will Tom solve the crimes and capture the villains? Or will the cutthroats learn he is really a lawman and dispose of him?