"1951. Esther Durrant, a young mother, is committed to an isolated mental asylum by her husband. Run by a pioneering psychiatrist, the hospital is at first Esther's prison but soon surprisingly becomes her refuge. 2018. Free-spirited marine scientist Rachel Parker embarks on a research posting in the Isles of Scilly, off the Cornish coast. When a violent storm forces her to take shelter on a far-flung island, she discovers a collection of hidden...