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When Anne Parker was convicted of shoplifting, Rachel, her adoptive mother, knew she had no alternative but to make a promise that would change the whole course of her life. The distressing incident, said their doctor, had been a cry for help and had sprung from the need for Anne to meet her natural mother. However, seeking a woman who does not want to be found is not easy at the best of times. How would Rachel know that she would uncover a secret that had lain hidden for so long?