Things are going well for Lieutenant Jacqueline "Jack" Daniels of the Chicago Police Department. She has solved a few difficult murder cases of high public interest and has gotten her personal life in order. Her friends and family are safe. Additionally, she recently received a call that deeply relieved her: Alex Kork, one of the most dangerous criminals Jack has ever brought down, has committed suicide in prison. But things quickly take a turn for the worse when a group of bloodthirsty vigilantes appears, and Jack discovers that Alex Kork may not actually be dead. Trapped in her house with a psychopath and besieged by snipers, Jack faces the worst eight hours of her life. And that says a lot.