Katie always looked after her beloved younger brother Chris - until she left him alone for one selfish afternoon. Although Chris survived the attack, now they're adults, and they haven't spoken in years. Then she gets a call, from Detective Laurence Page. Page is facing an unusually disturbing crime scene. Alan Hobbes, a distinguished and wealthy philosophy professor, has been brutally murdered. Page only has one suspect: Chris, caught on CCTV at the house. But he has plenty of questions. What could cause a man as wealthy as Hobbes not to repair his home? Why did he seem to know his death was coming, yet do nothing to stop it? And why was he obsessed with a legendary local serial killer? But Katie only has one thing on her mind. She knows this is her last, best chance to finally save her brother, and make up for her negligence all those years ago. But she can't possibly imagine just how much danger he's in...