At 8 a.m., the U.S. intelligence department received news that a nuclear bomb would explode in the United States today. In order to prevent this terrorist attack, CTU once again recalled Jack Bauer (Kiefer Sutherland), who had left CTU for a year because of the loss of his wife. As the investigation continued to deepen, the outline of the conspiracy became clearer and clearer. It turned out that in order to provoke a war, the terrorist organization forged a recording file and wanted to use the United States to launch a war against the three countries mentioned in the recording file. Although the president was very confident in Jack's investigation, he was powerless to stop this imminent war with only speculation and no substantial evidence. Because the president insisted on delaying the attack, the cabinet and the vice president temporarily deprived the president of his power through the constitution. Now Jack had no support from the president and could only fight alone. Time passed little by little. Can Jack find out the truth in the limited time?