The lightkeeper's secret

Tom Sherbourne, a veteran of WWI, is hired as a lightkeeper at Janus Rock, a lighthouse off the coast of Western Australia. He falls in love with a local girl, Isabel Graysmark, and they marry. Years later, after 2 miscarriages and 1 stillbirth, the grieving Isabel hears a baby’s cries on the wind. A boat has washed up onshore carrying a dead man and a living baby. They soon decide to keep the baby and raise her as their own, naming her Lucy.