When Lucinda Latimer is accused of murdering Archibald Harper, her bounty hunter brother Brodie is convinced of her innocence. Vowing to find the culprit, he turns up a witness in the form of drunken varmint Wilfred Clay - who, minutes after admitting to seeing the real killer, is shot to death on his own front porch. All the clues point to the murderer being Derrick Shelby - the man known as 'the devil's marshal'. The only trouble is, Derrick died a year ago...