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.
The chief of the FBI's counter-terrorism unit, John O'Neill, invites rookie Muslim-American agent, Ali Soufan, onto his squad. Fighting to get information from the CIA, they soon realize their work is just beginning…as two American embassies are bombed.
Continuing to keep information from the FBI, Schmidt is fired from Alec Station. Diane makes an important discovery about the owner of the phone number Owhali gave Chesney. O'Neill searches for solace in his faith as his personal and professional lives crumble before him.
The CIA and FBI are on high alert as threats surrounding the new millennium abound. O'Neill and Soufan raid an AQ cell in Brooklyn. The CIA continues to hide vital information from the FBI while they track suspicious individuals entering the U.S.