The owner of a fish-and-chips shop in the Billingsgate area of London harbors a secret ambition: to become a movie star. It turns out that she has a beautiful singing voice, and when that fact comes to the attention of a movie studio, it begins to turn her and her family's lives upside down.
The film hinges on the love triangle between a young aristocratic lady on the run (Cleonie, played by Hazel Terry), the murderous Varennes, Citizen-Deputy of the Revolution who saves her by disguising her as his nephew (Nils Asther) and finally the Marquis of Corbal of the film's title, played by Hugh Sinclair.
Kate is secretary to Lord Flamborough. But she is also leader of a criminal gang. Can Mike Pemberton catch her red-handed?
