Elspeth Swansome takes up the position of nanny on a remote Scottish island. Her charge Mary is distracted, secretive - and hasn't uttered a word since the death of her twin, William, just days after their former nanny disappeared. No one can say what happened to William. Just as no one can explain the lullabies sung in empty corridors. Nor the whistling that comes in the night... The perfect read for winter nights - a chilling and original new ghost story.