A mildly entertaining look at radio hams, those amateurs sending and receiving coded messages during the late thirties when films first dealt with the subject of "radio hams." In this case, the ham operators manage to be helpful during situations of stress, using their abilities with code to help someone in distress and to seek aid for pilots flying a missing plane.
The humorous ending has the family gathered around the radio listening to someone speaking Chinese while the narrator tells us how impressed the family was to be hearing someone across the world on their radio set. We then learn that the next-door neighbor's boy is the one sending the message.
Summing up: Routine short, typical of the sort of material expected to fill a Pete Smith Specialty.