In order for important British admiralty papers to pass into the hands of the Germans, the spy Gordon has the ingenious idea of ​​transforming a lamentable drunkard into a Lady, haughty but submissive to his orders. Stella's transformation is complete, the success extraordinary. Why must a French officer touching the heart of the former pochard bring down the fragile edifice? A submarine is about to blow up, Gordon is shot down and a confessed Stella returns to her horrible taverns to drown her sorrows in alcohol for good.