A commercial jetliner disaster has brought Tempe Brennan to the North Carolina mountains as a member of the investigative agency DMORT. As bomb theories abound, Tempe soon discovers a jarring piece of evidence that raises dangerous questions -- and gets her thrown from the DMORT team. Relentless in her pursuit of its significance, Tempe uncovers a shocking, multilayered tale of deceit and depravity as she probes her way into frightening territory -- where someone wants her stopped in her tracks.