An inventor adds new innovations to an air company's planes, prompting the owners of a rival company to set out to steal them. The stakes are sky-high as an airman and an aviatrix find themselves in constant peril, both on earth and above the clouds.

A 10 chapter cliffhanger serial made by William M. Pizor Productions. 1. Missing Men 2. Tongues of Flame 3. Swirling Waters 4. Out of the Night 5. Perilous Trails 6. Secret Passage 7. Division 8. Revenge 9. Pawns of Evil 10. The Hidden Treasure.