It's 1873 and the disbanded Texas Rangers have been replaced by the corrupt Texas State Police. Steve Lanning arrives posing as a wanted outlaw to get in with them in his attempt to have them replaced. His inside work helps the Durango Kid break up the State Police raids but he is in trouble when his secret identity as Durango becomes known to them.

A former model, serving time in prison, becomes a key witness in a trial against a notorious gangster. She is put under protective watch by the District Attorney in a posh hotel, but the crime kingpin makes attempts to get to her.