Unbeknownst to law enforcement in Chicago, the O'Toole family has been killing people for more than a hundred years. Peter Michaels gets on the trail of these generational serial killers after a massive gravesite is accidentally discovered on a Chicago golf course. The investigative reporter traces the O'Toole family back to the 1920's when the killings started. Currently Ryan O'Toole, the fifth, is on a killing spree. He has killed 37 people so far; will Peter Michaels be the 38 . Are these killers also cannibals? Are serial killers born or made. Peter Michaels discovers there is such a thing as a "warrior gene," and it's in all of us but with certain types of abuse during childhood it can create killers. Michaels calls in an old friend, Deborah Duke who is a blind genetic detective to trace DNA to help identify the victims and to solve the murders. The O'Toole family has killed more than 120 victims in the last hundred years. Also, a ruthless assassin is hell bent on killing the reporter because Michaels was responsible for the death of his best friend. This page turning thriller will be hard to put down.