Problems begin when a young woman, Millie Cairns, gets chicken pox. Dr. Cameron is sure she had it as a child and can't help but wonder if something odd is going on. While not unheard of, getting chicken pox a second time is not a common occurrence. Cameron visits the mother and gets the truth out of her: Millie is not her real daughter, who died soon after she and her husband left Tannochbrae many years before. This girl is actually her husband's daughter from an affair he had with a woman in Glasgow. When Millie hears of her past she calls everything into question: ...