This comedy is about Flight Lieutenant  Harrison has been driven down from London  to find out whether he should recommend that  Nuclear Command Bunker no. K553/44FS  need to be closed  Looming over the picturesque fishing village of Auchnacluchnie.  Auchnacluchnie has a nice pub where the landlord Iain Guthrie and lovely daughter Eilidh Guthrie live and work at the Inn.
 Eilidh Guthrie is a teacher in Auchnacluchnie who has a boyfriend. Will that stop Flight Lieutenant  Harrison from winning her affection.  Will the base that should house 300 now down to 3 be closed or not?
The three being Wing-Commander Campbell-Stokes (Roger Blake), an old-school military man who still thinks he's fighting the Communists; Flight Lieutenant Harrison (Chris Lang)the only sane one among them. and Airman Tench (Felix Bell) who doesn't think at all. The base gets one more Flight Lieutenant Harrison.