Successful writer Katya Kerensky has thrust the secret of her schoolgirl pregnancy, adoption of her baby forced on her by implacable parents, to the back of her mind. Now on a night of storm, she hears knocking at the door of her Perthshire cottage, is confronted by an aggressive teenager who declares she is Katya's daughter. Katya remembers a birthmark on the right side of her baby's neck, the angry girl facing her has such a mark but on the left side - after a fraught night the girl leaves. Katya investigates Judy's background. A clue leads her to Mull, where amongst wild, breathtaking scenery Katya finds love, discovers a frightening and incredible answer to her quest for information and suffers a vicious attack on her life, in this disturbing thriller with many twists and turns.