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.
Did you know: Chapter titles: - Chapter 1: Where East meets West - Chapter 2: The Invisible Enemy - Chapter 3: The Doorway of Doom - Chapter 4: The Radio Riddle - Chapter 5: Bullets of Sand - Chapter 6: Evil Spirits - Chapter 7: The Trackless Trail - Chapter 8: The Sign in the Sky - Chapter 9: Secret Service - Chapter 10: The Mountain of Jade - Chapter 11: The Dragon Commands - Chapter 12: The Squadron of Death - Chapter 13: The Worlds Akin