The film stars Rod Cameron, Wayne Morris, Kay Buckley, Sally Eilers, Carl Benton Reid and Roy Roberts.

Grif Holbrook is on a stage which is stopped by apparent bandits who are in fact a posse led by sheriff Winters.

Winters takes Holbrook to Butterfield who has arranged for the warrant as a ruse to get to speak to his ex-partner Grif so he can ask for help to stop the theft of his stages.

Kate is upset at losing her job but Grif says she can do the books at the Tucson office to which she agrees.

On their way to Tucson they are held up by men, led by Ira Prentiss, in a black coach covered in steel.

One of the men is to take the stage close enough to Tucson to drop the passengers off before stealing the coach.

On their way to their base, Maroon ranch, Grif escapes after shooting the driver, former Butterfield employee and friend Sam.

Before Prentiss can confirm who the leader of the gang is he is shot dead and there is a brief shootout between Grif and Barney and the two gangsters.

He has a list of the militia members and tells Barney anyone who doesn't show up was probably in the gang that stole the stage.

Grif arrives and Doc tells him Barney is being held captive at Maroon's ranch, then offers to get the sheriff.

Maroon is sending a wagon train with the stolen coaches back east, with Barney as one of the drivers, though he still doesn't trust him completely.

As Grif and Barney leave on the stage, Doc Banteen and the townsfolk who have joined Confederates march through town.