Set in Leeds in the Fifties Cold War period, Billie Piper stars as Betty, a young wife and mother who reluctantly falls passionately and hopelessly in love with her charismatic Polish neighbour, Alex Crazenovski, played by Theo James (new Woody Allen film, untitled). But little does Betty know that some 30 years later, in Eighties Thatcherite Britain, her affair will implode on her beloved son Mark's wedding day.