When a killer begins leaving behind cryptic online reviews and chillingly staged photographs of their crime scenes, DI Nancy Ravenscroft turns once again to Professor Ewan Laing. His forensic linguistics skills have proved invaluable before—and this time, the clues are more twisted than ever.

But as the investigation unfolds, the case starts to cut too close to home. With Nancy’s personal life bleeding into her professional world, staying objective becomes harder by the day.

When someone she loves is threatened, Nancy must decide how far she’s willing to go. Can she bring a killer to justice without losing everything she’s fighting to protect?