Lawrence Halliday, the family doctor, trapped in a trying marriage to the predatory Vickie, is the first to notice Anna's disappearance. Mrs Marsh, a critical friend of Anna's mother, had hoped that her arrogant son Nick might take an interest in Anna, but he is seeking greater sophistication and worldliness. And as for Anna herself, she has not so much disappeared as ceased to exist as the woman they all thought they knew.