When Rod, Ramrod, and Half-A-Rod ride into Steep Gulch, they immediately become Sheriffs. The previous Sheriffs have been killed by Mace and his gang who don't wait long before they make an attempt on the new trio.
Arthur Ferguson Jones (Edward G. Robinson) and Wilhelmina Clark (Jean Arthur) work at the same accounting firm. Jones turns out to look exactly like the notorious bank robber "Killer" Mannion (also Robinson) and is apprehended by the police.
After his true identity is confirmed, the district attorney gives Jones a letter identifying him, so that he can avoid the same trouble in...