Professor Hargrave (James Durkin), a noted scientist, is in Indo-China seeking an ivory-disc that is engraved with the formula for a deadly gas. Dr. Barshan ('John Davidson' (qb)), his assistant Wang (Frank Lackteen) and his henchmen are also after the sacred formula and will stop at nothing to obtain it. Professor Hargrave's daughter, Pauline (Evalyn Knapp), and flight-engineer Robert Ward (Craig Reynolds (I)') do their best to protect Hargraves from the band of villains.