sentences:  In preparing for a secret raid on a German-held French coastal village.a British security officer (Reginald Tate) is chosen to monitor activities in England among army personnel of the 95th Infantry as well as civilians with whom they mingle.At the same time, German intelligence send Agents 23 (Mervyn Johns) and 16 (John Chandos) to England to obtain information from sources including conversations overheard in pubs, railway stations, shops and other public places.