Charlie Morse sells a fine horse called "Dutchess" to ham actor Henry Hawkins. Morse's evil brother attempts to gain possession of the animal by murdering Charlie and framing Roy and Hawkins for the crime.
Roy is captured by a desperado who wants him to track down his missing horse, an outstanding equine which he considers faster than Trigger. The desperado regains his horse but loses his freedom when Roy ultimately overpowers him.
Luke Taylor's gang tries to save him from hanging by kidnapping the Governor during Mineral City's 75th Anniversary celebration. When the gang shoots ex-convict Jim Forrset, suspicion centers around young Bob Arden, whom Forrest has declined to accept as a son-in-law.
An old miner is trading stock in a non-existent gold mine in exchange for food for his old prospector pals. When his granddaughter Maybelle arrives in town, Roy and Dale investigate the old man's case.