In September 1940, American war correspondent "Mitch" Mitchell is stationed in London, working for Consolidated Press of America, which represents 1000 newspapers. Mitch is anxiously waiting for news of the expected German invasion of Britain from a reporter on the Continent, determined to scoop his competition. He manages to rent Sir Titus Scott's wire from Penzance in Cornwall for a week to save forty minutes. The information is to come by coded radio and homing pigeon messages. Twelve-year-old Albert Perkins and the elderly Mr. Bindle watch for the pigeons. During one of the many nighttime air raids against London, Mitch meets Jennifer Carson, a teletype operator at the Ministry of Information. They seek shelter in the Tube and become acquainted. The Consolidated offices are destroyed in the raid, but Mitch obtains the services of Jennifer and a teletype machine from Duffield, a Ministry of Information official. He then talks Mr Hobbs, the Regency Hotel's managing director, into letting Consolidated Press use the hotel's wine cellar for its new headquarters. A bomb plunges into the cellar, but fails to explode, so everyone assumes it is a dud. Later, however, Jeff, a blind Consolidated employee, realizes it is live and notifies Mitch, just as Mitch finally receives the pigeon message he has been waiting for. Mitch evacuates the place, but Jennifer suspects he is merely trying to bypass the censor, Captain Lionel Channing, so she refuses to leave. Another bomb closes the entrance, trapping them in the cellar. Mitch has Jennifer use the teletype to begin sending his big scoop: Hitler has gone to Calais, indicating the invasion is imminent. When Jennifer realizes he is sending uncensored information, she tries to persuade him to stop. They engage in a struggle before he locks her up. Then, Albert telephones with more pigeon-delivered vital information, but in the middle of the call, he is killed by the aerial attack. Mitch is devastated. Instead of transmitting his news, Mitch describes Albert's death. Jennifer is touched, and when the rescue team frees them, Mitch and Jennifer leave the wine cellar together.
The New York Times review described the film as "another of those somewhat incredible yet moderately exciting melodramas which employs a strikingly realistic background of exploding bombs and crumbling buildings for no other purpose save to provide topical dressing for a routine romantic excursion." The reviewer did, however, like the work of Ameche, Bennett, McDowell and Shields.
