Georgia Skeehan, a rookie fire marshal with the New York City Fire Department, finds herself heading up the investigation into a deadly SoHo fire that claimed fifty lives and uncovers links to three other unsolved fires and to a series of bizarre letters from a psychopathic arsonist calling himself the "Fourth Angel."

Georgia Skeehan, a rookie fire marshal with the New York City Fire Department, finds herself heading up the investigation into a deadly SoHo fire that claimed fifty lives and uncovers links to three other unsolved fires and to a series of bizarre letters from a psychopathic arsonist calling himself the "Fourth Angel."