This time, the attack will be launched in New York. After the efforts of the seventh season, Jack (Kiefer Sutherland) finally obtained the president's pardon, and now he lives a simple, relaxed and happy life with his daughter and granddaughter. But this life did not last long. A mercenary came to the door, hoping that Jack could return to the reorganized CTU to help investigate an upcoming terrorist conspiracy. It turned out that the president of a Middle Eastern country intended to sign a joint statement with President Taylor, but the opposition in the Middle Eastern country tried hard to organize the signing of this joint statement, so they wanted to assassinate the president. Jack had to accept this mission, and Chloe (Mary Lynn Rajskub) was also temporarily called back to help Jack with data analysis, but as a mother, Chloe could not concentrate on helping Jack wholeheartedly, and Jack had to investigate with newcomers who had no experience in dealing with terrorist attacks. Facing the new CTU, in an already unfamiliar environment, can Jack successfully stop the attack?