Life is pretty good for Lieutenant Jacqueline "Jack" Daniels of the Chicago Police Department. She's solved some of the city's toughest--and most high-profile--homicides. Her fiance, Latham, is on the mend from an almost deadly case of botulism. And she just got a call that eased her mind like nothing else could: Alex Kork, one of the sickest, most dangerous criminals Jack has ever put away, killed herself. But things sour quickly when a group of vigilantes on a murderous spree decide to take down a cop...and they turn downright ugly when Jack discovers Kork may not be so dead after all.