When a European diplomat is named ambassador to the United States, he relocates to Washington, D.C., with his niece, Princess Maria, where he hopes she'll meet an eligible American bachelor. On a side trip by plane to San Francisco, Maria takes a tranquilizer to settle her nerves, passes out in mid-flight, and is out for hours. The pilot, Eddie O'Rourke, volunteers to put her up at his place for the night, and when Maria awakens, she is taken with Eddie's decency and charm, and it is love at first sight. However, Maria's uncle was hoping for her to meet someone higher up the social ladder than a pilot, and the couple has an uphill battle getting him to consent to their wedding. Starring, Academy Award-winner Olivia De Havilland as the princess, Emmy Award-winner Robert Cummings as the pilot, and Academy Award-winner Charles Coburn as the uncle. An Academy Award winner for Best Original Screenplay.