Tells the true, but scarcely known, story of a group of secret rebels against Hitler. Drawn from Berlin high society, they include army officers, government officials, two countesses, an ambassador's widow and a former model - meeting in the shadows, whether hiding and rescuing Jews or plotting for a Germany freed from Nazi rule. One day in September 1943 they gather for a tea party - unaware that one among them is about to betray them all to the Gestapo. But who is the betrayer of a circle themselves branded 'traitors' by the cruellest regime in history?