Ravishing but gauche, she was marooned in Wales until the age of 20, due to lack of family funds - a situation Lady Agnes was delighted to reverse. But Lady Persie’s lack of education and the stimulation of the London scene made for a combustible mix. She rapidly became involved in Fascist politics, a fascination shared with chauffeur Harry Spargo. But whilst his commitment waned, hers continued after he ended their illicit affair

Having made a life for herself in Nazi Germany, Lady Persie is reluctant to return to Britain as the countries prepare for war, despite her sister’s concern. But when Lady Persie is forced to call on Sir Hallam’s help, their relationship evolves into something clandestine, compelling and deeply dangerous.