When an attempt on U.S. Army Sergeant Eric Carter's life is made after his return home from a mission to kill terrorist leader Bin Khalid, he discovers that he and his fellow Rangers' identities have been compromised. Carter enlists the help of former National Director of CTU, Rebecca Ingram, who quarterbacked the raid that killed Khalid and is one of the few who knew the Rangers' identities. Together they work to uncover a sophisticated terrorist network in a race against the clock to stop a devastating terrorist attack on United States soil.

When Ben Grimes demands money in exchange for the list he seized from a safe box in Khalid's compound, Carter must go back to his roots to help obtain the money. Meanwhile, Rebecca is determined to figure out who leaked the Rangers' files.

Rebecca's personal and work life collide when she gets a phone call that forces her to make an important decision. Meanwhile, Nicole confronts Carter about his commitment to their relationship and his future with the CTU.

Rebecca's deal to save Donovan doesn't go as planned. Meanwhile, CTU must rely on Carter to go out into the field and facilitate an important exchange.