NYPD detectives Tate Kensington and Zachary Gerard are convinced one killer is at work, but proving it seems an impossible feat until a pre-teen prank blows the case wide open. Both detectives have their own pasts to haunt them - Tate's ex-flame is now her boss, and Zach's estranged father is counsel for the defense. Complicating things even more are death threats, witnesses going AWOL, and an increasing attraction neither of them can continue to deny. Can the pair put away a killer on a paper-thin case? Or will their disappearing Jane Doe prove to be...THE LAST WITNESS...