Detective Alexandra Gray thought she had seen the worst of humanity in her years of service, but nothing could prepare her for the enigma of "The Harbinger," a meticulous and highly intelligent serial killer who leaves cryptic notes and eerie tokens at each crime scene. As the body count rises, Alex is pulled deeper into a psychological game that begins to consume her sanity. What starts as a hunt for a ruthless killer evolves into a terrifying journey into the darkest corners of human nature, forcing Alex to confront her own haunted past. The closer she gets, the clearer it becomes that The Harbinger might know her better than anyone else-and may be hunting her as well