Dr. Kay Scarpetta is working a highly suspicious death scene in Cambridge, Massachusetts, when an emergency alert sounds on her phone. A video link seems to be from her niece Lucy. But how can it be? It’s clearly a surveillance film of Lucy taken almost twenty years ago. As Scarpetta watches she comes to grips with frightening secrets about her niece. That first clip and others sent soon after raise dangerous implications that increasingly isolate Scarpetta and leave her confused, alarmed, and not knowing where to turn. The diabolical presence and singularly “depraved heart” behind what unfolds seems obvious—but strangely, not to the FBI. Certainly that’s the message they send when they start harassing Lucy and begin building a case that could send her to prison for the rest of her life. In the latest novel in her bestselling series featuring medical examiner Dr. Kay Scarpetta, Cornwell captivates readers again with the jolting twists, high-wire tension, and cutting-edge forensic detail for which she is renowned, proving yet again why she is the world’s number one bestselling crime writer.