Mistress of Greyladies

During WWI, Greyladies - an ancient manor house in rural Wiltshire - is requisitioned for a hospital. Its mistress, Harriet, Joseph and their sons are allowed to stay in the rear part of the house, but when tragedy strikes Joseph's brothers, his future at Greyladies is at risk. Latimer family legend says a new mistress will be found to look after the house, yet how does this happen? In Swind...