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 .... Ace Drummond
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
James B. Leong .... Henry Kee [Chs. 1-11]
Chester Gan .... Kai-Chek
Arthur Loft .... Chang-Ho, The Dragon
James Eagles .... Johnny Wong, Radio Operator
C. Montague Shaw .... Dr. Trainor
Frederick Vogeding.... Bauer [Chs. 1-6]
Al Bridge .... Paul Wyckoff