1938: Lady Vita Goldsborough lives in the menacing shadow of her controlling older brother, Aubrey. But when she meets local artist Dodie Blakeney, the two women form a close bond, and Vita finally glimpses a chance to be free.

1997: Following the death of her mother, Eve Blakeney returns to the coast where she spent childhood summers with her beloved grandmother, Dodie. Eve hopes that the visit will help make sense of her grief. The last thing she expects to find is a bundle of letters that hint at the heart-breaking story of Dodie's relationship with a woman named Vita, and a shattering secret that echoes through the decades.