Homicide Inspector Jane Candiotti is finally getting her personal relationship with partner Kenny Marks neatly sorted out, when their professional world is brutally rocked. An excon bent on revenge -- a man who spent fifteen years of hard prison time waiting and planning-has returned to San Francisco to prey on the officers connected with the destruction of his life. And now a devastating challenge faces two good cops trapped in a waking nightmare, as they watch their friends and colleagues fall one by one. Jane and Kenny must find and take down an elusive, unrelenting madman before they are the last two left alive...or the last two victims.