This 13 chapter serial is based on the comic strip character Ace Drummond created by Eddie Rickenbacker. Ace is a ‘G-Man of the sky’ working out of Washington D.C. He is sent to Mongolia to find out why a mysterious villain known only as ‘The Dragon’ is trying to prevent the newly formed International Airways from setting up an airport there. Ace meets Peggy Trainor (Jean Rogers) who is searching for her archaeologist father who has disappeared. Together they search for answers to the puzzles.
Adventure | Action
| John ‘Dusty’ King | … | Ace Drummond (as John King) | |
| Jean Rogers | … | Peggy Trainor | |
| Noah Beery Jr. | … | Jerry | |
| Guy Bates Post | … | The Grand Lama | |
| Lon Chaney Jr. | … | Henchman Ivan | |
| Jackie Morrow | … | Billy Meredith | |
| Selmer Jackson | … | William Meredith, Sr. | |
| Robert Warwick | … | Winston |
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