The serial's cast features John King, Jean Rogers, Noah Beery Jr. and Jackie Morrow, with Lon Chaney Jr. in a supporting role.

A mysterious villain who calls himself the Dragon is attempting to prevent International Airways from beginning service in Mongolia, in order to protect the secret of the mountain of jade for himself.

together with: Sam Ash as LePage; Hooper Atchley as Caldoni; Louis Vincenot as Lo Tan; Eddie Parker as Dmitri; Tom Steele and George De Normand as Other Henchman; Russell Wade as Pilot; House Peters Jr. as Co-Pilot; Diana Gibson as Stewardess; and Ed Piel Sr. as Passenger.

The famous aviator had driven out to the San Fernando Valley, after hearing that the serial was being shot there on location, where she watched the filming of the chapter two cliffhanger.

In the words of Cline, Ace Drummond "exuded the futuristic aura of Flash Gordon combined with the eerie mystery of Baron Frankenstein's castle laboratory.