A newly married WREN, presumed drowned when her ship is torpedoed, spends three years on a tropical island before returning to England to find her husband remarried with a baby son.

Upholsterer's assistant Irene O'Dare meets wealthy Don Marshall while she is measuring chairs for Mrs. Herman Vincent at her Long Island estate. Charmed by her, Don anonymously purchases Madame Lucy's, an exclusive Manhattan boutique, and instructs newly hired manager Mr. Smith to offer Irene a job as a model. She soon catches the eye of socialite Bob Vincent, whose mother is hosting a ball at the family mansion. To promote Madame Lucy's dress line, Mr. Smith arranges for his models to be invited to the ball.

In 1940 Sally Maitland is forced to leave England, ostracised as a Nazi sympathiser by everyone including her well-to-do family. On the ship to Halifax, Canada, she is courted by Polish aristocrat Jan Orloch and by awkward British navel intelligence officer Jimmy Garrick. She shows herself somewhat more amenable to Orloch's advances, and agrees to meet his mother in Halifax. Once there however, it becomes clear no-one is really who they say they are.