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.
John 'Dusty' King
Jean Rogers
Noah Beery Jr.
Jackie Morrow
Chester Gan
Guy Bates Post
Lon Chaney Jr.
Selmer Jackson
Robert Warwick
James B. Leong
Arthur Loft
James Eagles
C. Montague Shaw
Frederick Vogeding
Al Bridge