Une jeune fille d'origine basque, Luicha , montée à Paris et qui s'est lancée dans le show-bizz sous le pseudonyme d'Orchidée, "un marchand de champagne la protège" et fort désirée par un jeune homme de son village, Joannes Etch…

A scientist has invented a silent airplane motor of tremendous potential benefit to aeronautical and military concerns...

Mrs. Ramsey sent Jean Oliver to prison on a false charge. To get even, Jean (disguised as Madame Mystera) plans to kidnap her daughter and turn her into a thief. Love entanglements with a gangster known as "The Fox" and newspaperman Grant complicate her plans.