The quiet village of Bramley End is taken over by German troops posing as Royal Engineers. Their task is to disrupt England's radar network in preparation for a full scale German invasion. Once the villagers discover the true identity of the troops, they do whatever they can to thwart the Nazis plans.
Calling the Tune offers a fascinating look at the fledgeling gramophone industry as it tries to solve the problems of reliable recording and production methods. 'I predict that the gramophone will be the democratic entertainment of the future' states unscrupulous record label boss Mr Gordon (Sam Livesey), who finally gets his comeuppance after one dirty trick too far against his rivals. If the film's love story is perfunctory, the real interest comes with watching performers of the day, from Henry Wood and his orchestra to George Robey and Charles 'the laughing policeman' Penrose laying down their recordings direct to record. And something very like a prototype laser disc makes a crucial appearance too.
A wealthy author, looking for material, 'adopts' an incorrigible thief he finds in the streets, together with an attractive typist who is down on her luck.