When phony wanted posters put a price on the head of a retired Confederate officer, Colonel Sykes summons Josh Randall to help keep the bounty hunters at bay while also uncovering the person behind the bogus posters.
Randall is rooked into advancing half the bounty to a man who promises to lead him to the wanted criminal Shawnee Bill, but Bill is closer than Randall thinks and he's not even the only bounty hunter on his trail.
Randall is deputized to transport a ruthless killer to Tucson, but exchanges him for the nun kidnapped by the killer's gang. The nettlesome nun then becomes a thorn in his side as he sets out to recapture his prisoner.
Randall brings a suspected murderer to Pot Hole, but fears the man won't receive a fair trial when he finds the townspeople in the grip of a power-mad bully who serves as the hanging judge over a kangaroo court.
A woman on the lam for murdering her abusive husband seeks the help of her friend Josh Randall, who is willing to investigate her belief that her husband is still alive and responsible for the wanted posters that have made her a lucrative target for bounty hunters.
Josh sets out to help a heartbroken wife locate her missing husband, but his mission of mercy meets with a resistant and tight-lipped townspeople. The mission becomes desperate when Josh discovers another man is also seeking the missing husband, but with murder in mind.
Thieves are lying in wait to ambush mail carriers and eventually Josh is hired to help insure that the mail will get through. The thieves have news about a $20,000 Diamond Ring that is being delivered which they are waiting for. The trail is through desert country with no water for miles.