A micro-ray receiver (or similar) is placed on top of the building and demonstrated.
Full title reads "Lympne THE MICRO-RAY Another great step towards "safety in the air" inaugurated by Sir Philip Sassoon."
Several shots of something that looks like receiver of micro rays on top of the building - looks like a satellite dish. Pan down building to show the two men looking up. Pan up again. Close up shot of a dish.
Pilot seated in cockpit of a small plane. Plane in flight. A man seated at desk talking on the telephone. He is surrounded by people. Succession of shots of men with earphones on listening to something. Cut back to a man on the phone.
Note: Since there is no voiceover this story seems to be rather confusing. A dish is presumably receiver which enables the government to place greater control to Britain's air space. A man on the phone is most probably Sir Philip Sassoon who, according to the title, inaugurates the new invention.