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.