Refusing to marry the count that her uncle has found for her a young lady flees her wedding and is pursued by her uncle and fiancé. Making her way to the airport she climbs in to a mail plane unaware that its a decoy for bunch of bandits who are using some unknown means to crash the planes so they can steal the mail. Good variation on what has to be some sort of sub-genre of the 1930's namely the "electronic device that crashes planes genre" I think this is the fourth or fifth one that I've run across and they are all basically the same, with some differences. I think I've liked most of these films for one reason or another. This one works because of the witty repartee and the fact that its more than just flying planes over the spot so the villains can crash them. Actually there really is only the one crash and the film spins out from there. The film is also unique in that where many films have singers in the night clubs where they are set this one has comedians, which is something I've not seen before. Worth a look if you come across it.