A young woman sets out to get revenge against a rich man who murdered her lover.

At the height of World War II, the Germans discover that a certain British personage is to stay at the country house of Lord Buckley. They devise a plan whereby they will kidnap the real Lord Buckley, and send to England an actor who will masquerade, lie in wait for the visitor with a number of gunmen, and take him back to Germany.

British intelligence officers head off a Nazi plot to kidnap an atomic scientist.