"Humanity forgot the hidden world. But the hidden world has a long memory."
Officer Laura Collins deals in evidence, not urban legends. But when a series of high-profile deaths leaves victims "hollowed out"-physical husks with no biological cause of death-the evidence stops making sense.
Plagued by unexplained blackouts and hunted by a shadow organization she doesn't understand, Laura is the only person who has seen the face of the killer. They call her a witness. But in a world where memories can be rewritten and shadows move with intent, being a witness is a death sentence.
To find her missing fianc and stop a rising tide of violence, Laura must navigate a web of billionaire secrets and ancient grudges. But the deeper she goes, the more she realizes: the most dangerous thing in this war isn't the killer she's chasing.