New York City fire investigator and single mom Georgia Skeehan sifts through the ashes and uncovers the many layers of betrayal in this second thriller of the critically acclaimed series. Two doctors are killed in separate, fiery infernos that both show signs of "flashover"—the vicious and overwhelming combustion of a room and its contents by simultaneous ignition. Although the fires appear to be accidental, Georgia is troubled by a tenuous link between them. Both victims used to serve on a medical panel that determines whether disabled firefighters are entitled to line-of-duty compensation. With the evidence completely incinerated, and internal pressure to close the case, Georgia is left with more questions than answers. Her professional concerns soon take a back seat when a close friend disappears, leaving behind some chilling clues, and the chief suspect is none other than Georgia's boyfriend and fellow fire marshal, Mac Marenko, who harbors secrets of his own. The stakes are far larger than Georgia ever realized, with hundreds of lives on the line. For Georgia, the quest for justice has never been more elusive—or more deadly.