The air-mail pilots who fly from a small airport in the Rocky Mountains are determined but not paid well, and there are occasional fatal crashes. It's a tradition of long standing that when this happens, chief pilot Mike Miller (
Ralph Bellamy) makes the next flight himself. Daredevil Duke Talbot (
Pat O'Brien) is hired; he starts an affair with Irene Wilkins (Lilian Bond), wife of pilot Dizzy (
Russell Hopton). A fierce snowstorm rages when Dizzy next takes off. He crashes and is killed, so Mike makes the next flight. He crashes in an inaccessible valley, but survives. Although Duke has now run off with Irene, when he hears about Mike's crash, he decides to fly to the rescue. ~ Bill Warren, All Movie Guide