Tom Hardy (Bruce Willis) is a fifth-generation Pittsburgh cop. Formerly a homicide detective, Hardy was busted down to river rescue patrol two years ago when he publicly challenged his superiors, including most of his own family, about the identity of his father's killer. Convinced that a newly active serial killer is the same gunman who murdered his father-despite the fact that another man is already behind bars for that crime-Hardy is working out of his jurisdiction to catch the murderer. At odds with his new partner (Sarah Jessica Parker), he goes around the system, defying his uncle (Dennis Farina), his father's successor as chief of homicide, as he races the clock to find the real killer before the wrong man is executed for the crime.