The United States has a military presence in two thirds of countries around the world. A group of 12 have had enough and initiate a terror ultimatum called the Blacklist, a deadly countdown of escalating terrorist attacks on US interests. Sam Fisher is the leader of the newly formed 4th Echelon unit: a clandestine unit that answers solely to the president of the United States. Sam and his team must hunt down these terrorists using any means necessary, and stop the Blacklist countdown before it reaches zero.