With her marriage in danger of falling apart, Joanna returns home to the beautiful but dilapidated Mulberry Farm Cottage in rural Dorset, where her sister Harriet is struggling to keep the farm afloat and cope with their eccentric mother. When Joanna discovers a bundle of love letters in the attic, written by a watercolourist named Emmy, she is intrigued and sets out to discover Emmy's true story. Emmy's letters take Joanna to the picturesque alleyways...