Emma Vance wrote a story about the perfect murder. Three days later, someone copied it. While the police search for clues, Emma takes matters into her own hands. She's a writer, a profiler, and dangerously obsessed with the puzzle. Trapped in a school where every student and teacher had a reason to want the victim dead, Emma is determined to crack the case before the police do. As Emma's obsession isolates her from everyone she loves, the line between detective and suspect begins to blur. How far will she go to solve the puzzle? And who will she destroy in the process?