A bomb on board an airliner has an altitude-sensitive trigger. Unless a ransom is paid, it will explode when the plane descends to land.

"Fly ... and run out of fuel ! Land ... and my bomb explodes !"

Credits

William A. GrahamDirector

Jack LordSpecial Agent Frank Thompson

Edmond O'BrienThe Man

Katherine CrawfordJean

John SaxonGeorge Ducette