Czechoslovakia, March 1939, on the eve of World War II. As the German invaders occupy Prague, inventor Axel Bomasch manages to flee and reach England; but those who need to put his knowledge at the service of the Nazi war machine, in order to carry out their evil plans of destruction, will stop at nothing to capture him.
A businessman's daughter runs away from an arranged marriage, only to find herself penniless and suspected of theft after she becomes the victim of a bag thief in the train. When she refuses to tell him who she really is, her accuser decides to take her home where he can keep an eye on her until 12 o'clock the next day, the time at which she has calculated that it will be safe to tell the truth! But when his fiancée arrives unexpectedly and then his 'guest' is mistaken for her, it all gets rather embarrassing...
After a chance train encounter with Laurence Knight, Tom Blake's family's fortunes prosper on the beneficence of the great financier. A developing friendship leads to the Knights selling their home to the Blakes when they move back to London. All looks rosy for the Blakes as share prices in Mr Knight's new business venture soar, but is their confidence misplaced?
