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?
Includes: Hop-a-long Cassidy, The Eagle's Brood, Bar 20 Rides Again, Call of the Prairie, Three on the Trail, Heart of the West, Hopalong Cassidy Returns, Trail Dust, Borderland, Hills of Old Wyoming, North of the Rio Grande, Rustlers' Valley, Hopalong Rides Again, Texas Trail, Partners of the Plains, Cassidy of Bar 20, Heart of Arizona, Bar 20 Justice, Pride of the West, In Old Mexico, The Frontiersmen, Sunset Trail, Silver on the Sage, Renegade Trail, Range War, Law of the Pampas, Santa Fe Marshal, The Showdown, Hidden Gold, Stagecoach War, Three Men from Texas, Doomed Caravan, In Old Colorado, Border Vigilantes, Pirates on Horseback, Wide Open Town, Riders of the Timberline, Stick to Your Guns, Twilight on the Trail, Outlaws of the Desert, Secret of the Wastelands, Lost Canyon, Undercover Man, Hoppy Serves a Writ, Border Patrol, Leather Burners, Colt Comrades, Bar 20, False Colors, Riders of the Deadline, Texas Masquerade, Lumberjack, Mystery Man, Forty Thieves, The Devil's Playground, Fool's Gold, Unexpected Guest, Dangerous Venture, The Marauders, Hoppy's Holiday, Silent Conflict, The Dead Don't Dream, Sinister Journey, Borrowed Trouble, False Paradise, Strange Gamble
