Charting the military escapades of serial bungler Tommy Josser, Josser in the Army sees the hapless hero in France during wartime, where he masquerades as a German general, unmasks a spy, gets captured and then makes a spectacular airborne escape!

'Hall porter forced to join Navy while tracking spies.' (British Film Catalogue)

The fumble fingered Josser finds himself thrown off the police force for his constant bungling, but by the picture's end, he manages to redeem himself by breaking up a ring of crooks who have been fixing horse-races by doping up the horses.