"My name is Marie Cotter and I want you to believe me. Every word of this story is true. This is what happened to me. I'm back home again now, and sometimes, when I think about Bowdon House, I feel as if I was someone else when I was there, taking care of Amy. I'm trying to get back to normal. But I miss her so much. Also, I can't stop the dreams coming at night..."

Seventeen-year-old Marie has had a lot to cope with in her young life. Now she is recovering, and gets a job working for the widower, Dr Slade, looking after his four-year-old daughter, Amy.

At first, her new job seems perfect. Marie loves Amy, and Amy seems to like Marie, too. But, not long after arriving at Bowdon House, things start to change. It seems that not everyone is happy with the new situation... There appears to be someone else in the house - someone who is determined to come between Amy and Marie...