Hoppy and his pals arrive in a remote town to investigate the counterfeiting of both U.S. and Mexican money; his only clues are the name "Mordigan" and a drawing of a comet. He quickly finds out that Mordigan is the town "boss"; but what or who is "the comet", and why are Mordigan and his henchmen intent on persecuting a young woman, her drunken brother, and her deathly ill sister-in-law who've also just arrived in town?

Directed by: George Archainbaud
Written by: Doris Schroeder
Runtime: 61 minutes
Tagline: THE GREATEST GAMBLE OF ALL!
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Cast:
William Boyd William Boyd
Hopalong Cassidy 
Andy Clyde Andy Clyde
California Carlson 
Rand Brooks Rand Brooks
Lucky Jenkins 
Elaine Riley Elaine Riley
Nora Murray 
James Craven James Craven
Mordigan 
Robert B. Williams Robert B. Williams
Henchman Pete Walters