Erica Bain is a host of a New York radio show whose life is shattered by a brutal attack that leaves the love of her life dead, her own body shattered and her sense of safety permanently destroyed. Now, when Erica's fear of her beloved city becomes too much to bear, she arms herself to take back the streets. Soon Erica finds that the fear that once gripped her has become something else. And as stories of an anonymous vigilante grip New York, detective Sean Mercer pieces together clues that point to Erica.