After the Buckeye City Police Department receives a disturbing letter from a person who is threatening to kill 'thirteen innocents and one guilty' in an act of retribution, Detective Izzy Jaynes turns to her friend Holly Gibney of the Finders Keepers Agency for help.Meanwhile, outspoken activist Kate McKay is embarking on a lecture tour. But someone has started disrupting her events, and Holly is hired to be Kate's bodyguard.