Erwich arrives at a safe house and reports to his superior, Vladimir Bierko. Bierko kills Erwich, blaming him for trusting Nathanson who has turned against them. Bierko wants to concentrate on their real enemy -- the Russians.
One of Bierko's men goes looking for Nathanson in his office. Nathanson drives away nervously.
From his car, Nathanson phones a government associate and warns him that Bierko is on their trail. Nathanson hears the man being shot. He hangs up quickly.
McGill leaves a message on his sister Jenny's answering machine. He is frantically looking for the CTU keycard that was in his wallet. Jenny wants to give it back to him, but her boyfriend Dwayne refuses.
McGill tells the President that CTU has no leads on finding the terrorists. Logan blames McGill for not allowing the gas to be released in the mall like he had ordered.
An anxious McGill comes in as Buchanan is leading a briefing. McGill and Audrey argue about what should have been done in the mall. McGill questions why she keeps defending Jack. He wants Jack arrested in order to account for his actions. Buchanan calls Curtis with the news.
Curtis tells Jack about him being blamed by McGill. With the trail cold, Curtis convinces Jack that they should go back to CTU. He takes Jack's gun from him.
Audrey pleads with Buchanan to take control from McGill and leave Jack in the field. She is contacted by Nathanson, who warns her not to trace the call. He asks her to transfer him to Jack on a clean line. Nathanson knows she has a 'special' relationship with Jack, and he offers an opportunity to find the nerve gas.
Audrey calls Jack with Nathanson. Jack feigns for Curtis that it's merely a personal call. Nathanson admits to setting up Jack for Palmer's murder. Yet he needs protection in return for information about the terrorists. Nathanson wants the nerve gas stopped. He gives Jack a location to meet him.
Jack gets back in the car with Curtis, who asks about his relationship with Audrey. Jack knocks Curtis out and carries him to the curb. Jack retrieves his gun and drives off to meet Nathanson.
Curtis revives and tells McGill that Jack escaped after getting a call from Audrey. Jack can't be traced because he shut down the transceiver in the car. McGill orders him back to CTU.
McGill thinks Audrey helped Jack escape custody, but she claims ignorance.
Audrey calls Chloe at her desk and tells her that Jack went dark to follow a lead. She asks Chloe to delete the record of her call to Jack. To do this, Chloe must erase all of Audrey's calls for the entire day. McGill, meanwhile, has the communications department send Audrey's phone log to his computer. He sees that all the records quickly vanish from his screen. McGill senses that something is wrong.
Novick has Cummings' cell phone. An untraceable caller is claiming to have the Sentox gas and he will only speak to Logan. Bierko tells Logan that Erwich is dead. He intends to strike at Russia on foreign soil by assassinating its President, Suvarov. Bierko demands Suvarov's motorcade route as well as a profile of his security detail. If Logan refuses to cooperate within fifteen minutes, Bierko will release the nerve gas in more populous American areas.
Novick stresses that to give up Suvarov to the terrorists will destroy America's relationship with Moscow. Logan requests Suvarov's route from the Secret Service even though he hasn't yet decided what to do.
McGill shows Buchanan that Audrey's phone log was erased. He thinks Audrey did it on purpose, especially since she was on the line with Jack before he escaped. Buchanan acknowledges that Jack and Audrey were romantically involved while at Defense. McGill suspects whether she knew that Jack had always been alive.
Jack races to meet Nathanson. He pulls up to a phone booth, where he answers a ringing cell phone. Nathanson is watching him from a building above, and he directs Jack into an alley and up some stairs. A chopper suddenly lands on the roof of the building. Jack sees the terrorists and warns Nathanson to move out. Jack will meet him in an adjacent building.
Buchanan asks Audrey pointedly whether she helped Jack escape from custody. 'Not exactly,' she says, explaining Nathanson's call. McGill comes up, requesting to work with Audrey over her shoulder.
Jack makes his way to meet Nathanson on top of an empty warehouse. Nathanson gets surrounded by terrorists, engaging in gunfire as he flees. The gunmen follow him to the roof, but Jack takes them out before they can kill Nathanson.
A helicopter appears and fires at Jack and Nathanson. Jack shoots at the chopper's engine, and it retreats. Yet Nathanson is hit. Jack begs him for information on the canisters. Nathanson gives Jack a chip, but he dies before imparting what it means. Jack inserts it into his cell phone.
The terrorists let Bierko know that Nathanson was aided by another man. Bierko orders them to find this person.
As McGill works with Audrey at her desk, he notices that she is ignoring her ringing phone. She answers and it is Jack. Audrey pretends that it is a wrong number. She transfers it to Chloe. Chloe tells Jack that McGill has become suspicious. Jack uploads the data from the chip to her.
Novick brings Logan the motorcade information, warning him that the Russians would consider turning over this data as an act of war. Logan wonders if they can help prevent the terrorists from succeeding on the attack. Martha enters and hears the word 'attack.' Logan is forced to tell her the truth, and she is appalled that he would condemn the Russian president to death. She demands that he refuse to negotiate with the terrorists because that is America's policy and the basis of the treaty he just signed. 'It's not that simple,' Logan says.
Chloe encounters a problem decrypting the file from Jack because it has been formatted by the Defense Department. She calls Buchanan, who pulls McGill aside to distract him. As McGill talks to Buchanan, Chloe sends an instant message to Audrey asking for her DoD password. After Audrey transmits the password, she closes the message box. McGill catches this and questions her. Audrey lies, but McGill accuses Audrey and Buchanan of protecting Jack.
McGill knows he can't reproach Audrey because her father is the Secretary of Defense. Instead, he has Buchanan taken into custody. McGill announces to the CTU staff that everyone's station is being monitored. Audrey threatens to tell her father that McGill is jeopardizing the mission.
Chloe calls Jack with what she uncovered on the chip. A company called Terra-Dyne has acquired raw strontium isotope, which is used to make the Sentox gas. The company is a subsidiary of Omicron. Jack recognizes the name Omicron and asks Chloe to find out whether someone named Christopher Henderson is a senior executive there. She confirms this, and Jack says that he once knew Henderson. Chloe cannot send the files to Jack because McGill is watching her. She tells Jack that McGill took Buchanan into custody for insubordination because he is getting pressure from the President to find the canisters.
Logan begs Martha to understand that this is a difficult decision for him. She is resigned to the exigency of the situation. As they exchange greetings with the Suvarovs, Novick gets a call from Bierko. Novick gives him the motorcade's route.
Bierko maps out the strike point for his men. Meanwhile, Logan and Suvarov pose for press photos.
Martha begs her husband to prevent the Suvarovs from leaving. Logan gets a call from McGill, and he excuses himself. As he leaves, Martha alerts Agent Pierce that she will be accompanying the Suvarovs to the airport. To protect the First Lady, Pierce must ride in the same car with them. Martha asks Pierce to tell her husband where she is. The car pulls out of the retreat.