Emma and Abby were once best friends. Then something terrible happened. But that's all in the past. Now Emma is at a new school and has made new friends. Until suddenly Abby disappears. And Emma realises that she was the last person to see Abby before
she went missing.

But why is Emma being so secretive? What has she got to hide? And why is she so obsessed with someone from the past? Slowly Emma discovers that if she is to find Abby, she must relive events that she has tried very hard to forget.