Based on the Pulitzer-Prize winning book, The Looming Tower traces the rising threat of Osama Bin Laden and Al-Qaeda in the late 1990s and how the rivalry between the FBI and CIA during that time may have inadvertently set the path for the tragedy of 9/11. The series follows members of the I-49 Squad in New York and Alec Station in Washington, D.C., the counter-terrorism divisions of the FBI and CIA, respectively, as they travel the world fighting for ownership of information while seemingly working toward the same goal - trying to prevent an imminent attack on U.S. soil.