Psychologist Grace Callahan has no idea that she has a secret--and a target on her back.

When one of her clients is murdered, Grace quickly realizes that computer security specialist Stephen Shaw wasn't suffering from paranoia. What she doesn't know is that someone believes Shaw gave her a vital piece of information before he died--and they are ready to silence her at any cost. Her only hope may be an old friend, Detective Nate Quinn, who has just been cleared for active duty after a bombing killed his partner and left him dealing with PTSD.

With her signature pulse-pounding suspense, bestselling author Lisa Harris takes you deep into the heart of fear in this race against the clock.