Angelfield House stands abandoned and forgotten. It was once home to the March family - fascinating, manipulative Isabelle, brutal, dangerous Charlie, and the wild, untamed twins, Emmeline and Adeline. But Angelfield House hides a chilling secret which strikes at the very heart of each of them, tearing their lives apart...

Now Margaret Lea is investigating Angelfield's past - and the mystery of the March family starts to unravel. What has Angelfield been hiding? What is its connection with the enigmatic writer Vida Winter? And what is the secret that strikes at the heart of Margaret's own, troubled life?

As Margaret digs deeper, two parallel stories unfold, and the tale she uncovers sheds a disturbing light on her own life...