Anna Neagle ("Sally") is quite efficient as the supposed Nazi sympathiser who abandons her family in a frequently bombed London and heads to the safety of Nova Scotia. En route, she attracts the attention of both the suave Polish officer "Jan Orlock" (Albert Lieven) and of the apparently hapless British one - Richard Greene ("Garrick") on the boat. On arrival, she befriends the mother of "Orlock" (Lucie Mannheim) and our story of espionage and counter-espionage begins in earnest. Nobody is exactly - or even remotely - whom they say they are and Herbert Wilcox manages to keep us guessing for…