Attention to detail has always placed him beyond the reach of the law. But Isaac has just made the costly mistake of compassion, and his error has left a trail that is being followed by the crime family of his latest victim. And another, far more adept, tracker has taken up the trail: An 'artificial intelligence" program, developed by a humble Princeton scientist and funded by the US government, has been assigned to find him, and its analytical abilities far surpass his own.