Rachel Cook has more problems than most teenagers: bullied at a new school, a boy who doesn’t even know she exists, a masochistic Maths Teacher. And haunted by the ghost of her best friend. Katie’s return offers companionship and protection against a clique driven by terrible secrets. As Katie grows in influence and power, Rachel comes to fear Katie may have her own agenda and she finds herself hurtling towards a terrifying ending. Rachel has to decide who to trust: who are her friends and who are her enemies? Because, someday soon, her life will depend on it.