With the Third Echelon winding down its operations following a Presidential Order, President Patricia Cornwell forms the 4th Echelon, a new elite force made up of operatives from different agencies who report directly to the President herself. And the man in charge of the 4th Echelon is none other than legendary agent Sam Fisher. Their mission: track down the terrorists responsible for the Blacklist Threat before the clock counts down to zero.
