At her surprise 40th birthday party, Kate Granger feels like the luckiest woman in the world but just hours later her fifteen-year-old daughter, Caily, is found unconscious underneath a bridge when she should have been at school. Now, Caily lies comatose in her hospital bed, and the police don't believe it was an accident. As the investigation progresses, it soon becomes clear that not everyone in the family was where they claimed to be at the time of her fall. Caily should be safe in hospital but not everyone wants her to wake up. Someone is desperate to protect the truth and it isn't just Caily's life that is in danger. Because some secrets are worth killing for...