1911: Inside an asylum at the edge of the Yorkshire moors, where men and women are kept apart by high walls and barred windows, there is a ballroom vast and beautiful. For one bright evening every week they come together and dance. When John and Ella meet, it is a dance that will change two lives forever. Set over the heatwave summer of 1911, the end of the Edwardian era, the Ballroom is a tale of unlikely love and dangerous obsession, of madness and sanity, and of who gets to decide which is which.