As the Great War breaks out in Europe, English brothers Roy and Monte enlist in the Royal Flying Corps to fight for king and country, while their Oxford College friend Karl is ordered back to Germany. As a love triangle develops involving Monte, Roy, and Roy's girlfriend, Helen, the brothers' disparate personalities, and Monte's cowardice in the face of war soon threaten to compromise a top-secret bombing mission over German territory.

• The Caddo Company
• Ben Lyon
• James Hall
• Jean Harlow
• John Darrow
• Lucien Prival
• Frank Clarke
• Roy Wilson
• Douglas Gilmore