Unlock the door to a twisted mind...He targets his victims in their own homes, subjecting them to a terrifying ordeal before leaving their lifeless bodies in their hallway for a loved one to find. At first the murders appear unrelated, the notion of a serial killer at large almost dismissed - but the killing hasn't stopped. Back on the job after a year out, NYPD Detective Joe Lucchesi becomes the reluctant lead in the high-profile investigation. Battling physical pain, he struggles to make progress, then just when he feels close to making a breakthrough, the investigation itself is rocked by tragedy, and the body count rises.