Inspector Leduque comes from New Orleans to Virginia City to take Ben Cartwright back for a 20 year murder. When Ben declares publicly that he is withdrawing from the Governor's race, the townsfolk are upset not just about this but Little Joe has also been accused of gunning down Leduque's deputy in cold blood.

Ben and Adam are locked in jail, about to be hung for a crime they didn't commit. Joe and Hoss must find out why the witnesses to the alleged crime have perjured themselves before the execution takes place. They receive help from an unexpected source, a drifter called Lassiter who is searching for the men who committed a lynching in Kansas years ago.