in this blood-pounding thriller, homicide detective temple stone puts his own life on the line to protect boston from a vengeful serial killer. after surviving three rounds to the chest, homicide detective temple stone knows he is on borrowed time. his medical leave is cut short when the body of a beautiful woman is dumped in the heart of boston for the entire city to see. and her killer has left a chilling warning -- there is more to come. in what could be his last investigation, temple stone must work fast, combing through misleading clues in a complicated case if he wants to catch the twisted killer who likes to drain his victims' blood and hide their faces behind a petrifying mask. and as the sinful deeds become public, the entire city is plunged into chaos and no one feels safe. everyone begins to question whether temple has what it takes to catch the vigilante. before long, temple lands in a hospital bed, facing his own death. and as the minutes slip away, temple puts it all together, realizing who is behind the terrifying murders. but can he bring the monster down in the hours he has left to live or would more innocent blood be spilled?