On the eve of World War II, the German Kurt Müller, his American-born wife Sara, and their three children, having lived in Europe for years, visit Sara's wealthy mother near Washington, DC. Kurt secretly works for the anti-Nazi resistance. A visiting Romanian count, becoming aware of this, seeks to blackmail him.

Bette Davis
as Sara Müller

Paul Lukas
as Kurt Müller

Geraldine Fitzgerald
as Marthe de Brancovis

Lucile Watson
as Fanny Farrelly

Beulah Bondi
as Anise

George Coulouris
as Teck de Brancovis

Donald Woods
as David Farrelly

Henry Daniell
as Phili Von Ramme

Eric Roberts
as Bodo

Donald Buka
as Joshua