Born in Carlisle in 1887, brought up in a children's home and by reluctant relatives, Evie, with her wild hair and unassuming ways, seems a quiet, undemanding child.

Shona, born almost seventy years later, is headstrong and striking. She grows up in comfort and security in Scotland, the only child of doting parents. But there are, as she discovers, unanswered questions about her past.

The two girls have only one thing in common: both were abandoned as babies by their mothers. Different times, different circumstances, but these two girls grow up sharing the same obsession. Each sets out to stalk and then haunt her natural mother. Both mothers dread disclosure; both daughters seek emotional compensation and, ultimately, revenge.