After the death of her mother, moving to Dulwich is set to be a new start for sixteen-year-old Anna Playfair and her father. Unfortunately for Anna, her dad's new wife and her daughter have come too.

When Anna is attacked at night by some unseen force, her suspicions about her new home are confirmed. Together with her new friends, Anna tries to forget her troubles, but unbeknownst to her, her friends are hiding secrets of their own.