Detective Michael Bennett's enemies know where to find him.An anonymous tip about a crime in Upper Manhattan proves to be a set-up. An officer is taken down - but despite the attackers' efforts, it's not Michael Bennett.New York's top cop is not the only one at risk.One of Bennett's children is attacked. And a series of murders follows, each with a distinct signature, alerting Bennett to the presence of a professional killer.Bennett can't tell what's driving the assassin.But he can tell it's personal.