Lucy Townsend lives a normal life. She has a husband she loves, in-laws she can't stand and she's just found out she's going to be a mother.

But Lucy has a dark and dangerous secret. She is not who she says she is. Lucy is not even her real name.

Twenty years ago, she escaped something terrible. Something she has tried to put behind her.

But someone out there knows all of her secrets and has been biding their time to come back for her; the thirteenth girl, the only one who managed to escape.

Lucy was lucky once. But now it's not only her life on the line. Will she be so lucky this time?

A totally gripping, edge-of-your-seat thriller with twists and turns you just won't see coming. Perfect for fans of Girl A and The Family Upstairs.