A lost child: On the eve of the first world war, a little girl is found abandoned on a ship to Australia. A mysterious woman called the Authoress had promised to look after her - but the Authoress has disappeared without a trace.

A terrible secret: On the night of her 21st birthday, Nell O'Connor learns a secret that will change her life forever. Decades later, she embarks upon a search for the truth that leads her to the windswept Cornish coast and the strange and beautiful Blackhurst Manor, once owned by the aristocratic Mountrachet family.

A mysterious inheritance: On Nell's death, her granddaughter, Cassandra, comes into an unexpected inheritance. Cliff Cottage and its forgotten garden are notorious among the Cornish locals for the secrets they hold - secrets about the doomed Mountrachet family and their ward Eliza Makepeace, a writer of dark Victorian fairytales. It is here that Cassandra will finally uncover the truth about the family and solve the century-old mystery of a little girl lost.