Every instinct told her to run... Natalie Grey is living a nightmare. She has discovered a disturbing website link on her new partner's computer and fears he has a dark side, and even darker intentions. When her husband died in a hit and run accident, Ed had seemed like a safe harbour. Now where can she turn? Concerned for the safety of her fifteen-year-old daughter Scarlett, she moves them both to a new home beyond his reach, unaware that the apartment holds secrets of its own. Left alone during the long days of the school holiday, Scarlett investigates strange sounds coming from the other side of the wall, never anticipating the danger that awaits her there. DCI Tom Douglas's investigation into the apparent suicide of a teenage girl draws him ever closer to Natalie and Scarlett. But will he be too late to protect them from the danger they face, or from the truths that will tear their lives apart? Will they ever feel safe again?