"Hopalong Cassidy Meets the Queen of Mesa Grande and matches his wits and heart against her brains and beauty."
A crusading newspaper editor recruits his old friend Hoppy to take the job of Marshall in a town rife with vice and murder directed at helpless miners.

Hopalong Cassidy
Windy Halliday
Lilli Marsh
Bob Claiborne
Blackie Felton
Buddy Cassidy
Mary Saunders
Bob Saunders, newspaper editor
Peg Leg Holden
Blacksmith Pete
Assayer Benson
Henchman Dugan