What if someone knew everything about you? Where you live. Who you trust. Your worst memories. Every dark secret.

And what if that someone was a murderer?

For three years, journalist Jennifer Gibbs has been following a brutal serial killer who leaves his victims' mutilated bodies scattered across her Ohio hometown.

Or maybe he's following her.

With each murder, he sends her an elaborately staged photo of his victim, along with a clue that hints at his identity and shows off how well he knows her: A cocktail napkin from her favorite restaurant. An engagement ring that's no longer hers. Even fingerprints of people she cares about.

As the violence escalates, Jennifer races against a ticking clock to learn the killer's identity—an identity she must uncover not only to stop the murders, but to save herself from the same fate.