In the tangled web of online dating, NYPD Detective Kat Donovan stumbles upon a profile that strikes a chord deep within her heart. The man staring back from the screen is her ex-fiancé, Jeff, whose departure eighteen years ago left her with a shattered heart and unanswered questions. This unexpected digital encounter ignites a mix of old feelings and new possibilities, thrusting Kat into a whirlwind of emotion and hope. Yet, what begins as a flicker of reconciliation soon twists into a dark and dangerous journey. As Kat reaches out to reconnect, she unwittingly steps into a sinister plot that drags her into the depths of human depravity and a conspiracy that preys mercilessly on the vulnerable. As the investigation unfolds, the body count rises, and the dream of rekindling love with Jeff slips further away. Kat finds herself questioning the very foundations of her past relationships, including the unresolved murder of her father, which has haunted her for decades. Navigating through a maze of betrayal, suspicion, and terror, Kat is pushed to her limits. With everything she holds dear on the line, including her own life, she must delve deeper into the darkness than ever before. In this chilling thriller, Harlan Coben masterfully crafts a tale of love lost and found, of unimaginable horrors, and the relentless pursuit of justice. Kat Donovan must discover if she possesses the strength to confront what lies at the heart of the darkness and emerge unscathed, or if the truth will be her undoing.