Based on the story of the Mitford sisters, six sisters who refused to play by the rules and whose often-scandalous lives made headlines around the world. Set in the 1930s, it is a tale of betrayal, scandal, heartache and even imprisonment.
The Sisters included a famous author, a communist, a Nazi sympathizer, and a smattering of British fascists. Oh, and the only boy in the family, also Nazi sympathizer, had an affair with a boy at Eton and then went on to have affairs with women later in life until dying in the war fighting for Italy against the Allies - although I'm not sure he's in the show in a major way.