First published in 1872, the story is that of Olivia who, as the curtain opens, has been locked in a room, threatened, and is frantic to escape. She sees her chance, and her escape takes her to the smallest of the Channel Islands named Sark. There she and lives peacefully, under an assumed identity, until she has an accident and is in need of a doctor. Dr Martin Dobree comes from the neighboring island to help her and is instantly taken with her. Thus unfolds various circumstances that delve into Olivia's past and what will become of her future.