American Douglas D.B.7 aeroplanes being used by the RAF.
Title reads: "Night Fighters".
Unidentified RAF air base.
Various shots of a line of American Douglas D.B.7. night fighter aeroplanes warming up and moving off. Panning shot of a Douglas D.B.7. taking off. Good ground to air shots of the aircraft flying low over the camera. Air to air shot from above of three of the fighters in flight over the countryside. L/S of two fighters coming into land. Various C/Us of the crew of RAF (Royal Air Force) men who fly the D.B.7.
Note: according to narrator the D.B.7. has been adapted for role of night fighting and has been named 'Havoc'.