In Bournville, a placid suburb of Birmingham, sits a famous chocolate factory. For eleven-year-old Mary and her family in 1945, it’s the centre of the world. The reason their streets smell faintly of chocolate, the place where most of their friends and neighbours have worked for decades. Mary will go on to live through seventy-five years of social change, from the Coronation and the World Cup final, to royal weddings, royal funerals, Brexit and Covid-19. She’ll have children and grandchildren and great-grandchildren. Parts of the chocolate factory will be transformed into a theme park, as modern life and the city crowd in on their peaceful enclave. Will these changing times bring Mary’s family – and their country – closer together, or leave them more adrift and divided than ever before?