Tate Echo, former FBI profiler, is trying to put the past behind him. A broken marriage drove him away from the woman and job he loved and sent him to the mysterious Black Hills to lick his wounds. Taking a job in his sleepy home town of Pine Ridge, South Dakota, he is far away from the big city problems and twisted killer he once stalked-or so he thinks. One night changes everything as a local elementary school teacher is raped and mutilated and a dangerous killer makes his presence known. Now, with his job on the line and rumors as to the real reason he left the FBI, Tate must find some answers-even if that means opening old wounds. When another body is found, confirming a serial killer, Tate calls in FBI SSA Emma Gage-Echo, expert profiler and his ex-wife. Though they have unfinished business to be settled between them, they must set aside their feelings and focus on finding the killer when a third grisly murder is discovered. Once they realize that the killer is finding his victims among geocachers, Emma makes the decision to use herself as bait; ignoring Tate's protest. One dark night will decide their fate-to have a chance at a future or end it all at the hand of a ruthless killer.