During World War II, David Simms pilots supplies between India and China over the Himalaya Mountains.
| Actor | Role |
|---|---|
 Rex ReasonDavid Simms | David Simms |
 Diana DouglasElaine March Simms | Elaine March Simms |
 Myron HealeyBill March | Bill March |
 Strother MartinCo-pilot | Co-pilot |
 Robert KarnesRadio Operator | Radio Operator |
| HHarold FongSergeant Lee | Sergeant Lee |
| HHarold DyrenforthProfessor Faber | Professor Faber |
 Jarmila VackováMrs. Faber | Mrs. Faber |
 William SchallertAylen | Aylen |