Code of the Air: A criminal mastermind uses a "death ray" machine to bring down government airplanes. Police dog, Silverstreak, aids in capturing the insane inventor of the machine. Masked aviator Pilot X is part of the "Air Hawks" gang who threaten the Baker Aircraft Company. Pilot X's actions are focused on stealing Baker's Aerometer, a revolutionary navigational instrument. World-famous aviatrix, Fawn Nesbitt, aids in combatting the attacks on Baker's aircraft.