Dr. Kay Scarpetta is working a suspicious death scene in Cambridge, Massachusetts, when an emergency alert sounds on her phone. A video link lands in her text messages and seems to be from her computer genius niece Lucy. But how can it be? It’s clearly a surveillance film of Lucy taken almost 20 years ago. The diabolical presence behind what unfolds seems obvious --- but strangely, not to the FBI. Certainly that’s the message they send when they raid Lucy’s estate and begin building a case that could send her to prison for the rest of her life.