Kim frantically searches and finds Megan. The police come to Gary's aid, and he tells them that Kim kidnapped his daughter.
As Mason drives north out of Los Angeles, Tony phones him with news that the LAPD located a suspect in Panorama City. District wants Mason to check it out on his way to Bakersfield.
At the Northwest O.C., Lynne gives the President bad news: the predicted casualties are actually higher than they had anticipated. Ruling out any possibility of a "dirty bomb," the NSA now believes they are looking for a nuclear weapon.
Now a member of the crew, Jack questions why CTU is being targeted. Eddie won't reveal any information. Suddenly, Jack's cell phone rings. It is Kim, but she has not heard any of the messages from her father because she lost her phone. Jack tries to not give anything away in earshot of Eddie's crew. Although Kim begs for Jack's help, he tells her to go to her Aunt Carol's house. Kim doesn't understand why he is telling her to go all the way to San Jose. Kim then calls Tony, who informs her that Jack is working undercover. Tony asks her to get to CTU, and she says she will take a bus.
All the phones in CTU get corrupted as Eddie's crew takes out the phone lines at a relay station. Eddie sends Jack to watch the road. He discreetly calls CTU to warn them, but he can not get through. Jack instead calls the O.C. and asks to speak to the President.
Since Palmer is in the midst of a press conference, Lynne takes the call and is warned of the attack on CTU. Jack asks her to have the building evacuated, and then clicks off when Eddie approaches. At the O.C., Lynne and Eric Rayburn presume that this hit on CTU is a diversion from the main nuclear attack. When Lynne wants to notify CTU, Rayburn stops her. He believes that doing so will blow Jack's cover and ruin his chances of getting close to the Second Wave terrorist Joseph Wald. Yet Lynne is adamant about telling Palmer, and she asks Jenny Dodge to interrupt the press conference.
Two telephone repair workers arrive at the relay station to find that the locks have been cut. Eddie's van ambushes them, and Eddie shoots one of the workers. He orders the other one to call his boss to say that he must go on site at CTU to check the phone system.
Rayburn calls Tony with an order to copy and transfer all CTU database information about the nuclear threat onto NSA's server. Since he wants it done in under an hour, Tony has Paula work on sending the data over. She goes into Mason's office to use his computer. Michelle points out to Tony that if this order had only been precautionary, then other agencies would have received the same request. CTU was the only one asked to forward their databases.
Mason arrives at an industrial complex in Panorama City where a vehicle was linked to someone on the terrorist watch list. This complex is the same place where the nuclear bomb was being built by Marko's team. The police at the scene break into the building, and they see the remains of the area where the nuclear weapon was constructed. Suddenly, a gunman fires at the officers and a shootout occurs. Mason realizes that a powder has dispersed in the air and he notices the radiation warning sign. He coughs as he calls out to a policeman to summon HAZMAT. This may be a possible hot zone.
Kim rides with Megan on a city bus toward CTU. Megan asks whether Kim makes her own father mad. Kim reassures her that she is not the cause for Gary's anger, and promises that she will never let him hurt Megan again.
The telephone repair van pulls up to CTU, and the worker lies to the security guard that he is there to fix the phones. Although Eddie and his crew are in the back, they are cleared into the complex. The worker asks what the crew could possibly want from CTU, and Eddie explains that they are taking back their country. "We're patriots," Jack says.
At the Warner house, Kate gets a call from her private investigator, Ralph Burton. He confirmed that Reza did have contact with the terrorist. Burton is obligated to notify the authorities at Homeland Security, and he warns Kate not to tell anyone. When she hangs up, Marie and Reza playfully coax her to meet his cousin, but Kate pulls away forcefully. Marie confronts her, but Kate tearfully says that she only wants her sister's happiness.
Lynne is surprised to see Jenny hurrying through the O.C. She had asked her to interrupt the President's press conference. Jenny had slipped him a note about Lynne's urgent request, but Palmer did not respond.
As Eddie and his crew make their way into CTU, Jack waits in the van with the tied up worker. He urgently writes a note of warning that there are bombs being placed in the building.
Mason calls Tony from Panorama City to tell him about the lab where the terrorists have assembled the nuclear bomb. Everyone at the scene is being put through decontamination, but they still don't know if they were exposed to radiation. Mason will send Tony the fingerprints from the dead bodies to see if they match anyone on the watch list. Tony informs him that NSA ordered CTU's database be transferred, but did not make the same request from other agencies. Mason agrees that this is not usual protocol.
Michelle approaches Paula in the restroom. Although she is worried about her friends and family living in Los Angeles, the scared Paula knows it is her duty to keep working.
In the van, Jack releases the phone worker with the note intended for Tony, explaining that he is a government agent working undercover. After the worker gets out, Jack cuts himself with his switchblade to create the impression that he has been struck in the head. Eddie and the crew return to the van and find Jack knocked out. Eddie is mad that the telephone guy got away, but gets everyone in the van out before the building explodes. As the van pulls away, Kim and Megan arrive. She tells the security guard that Tony is expecting her.
Lynne is angry that Palmer did not call her when the press conference broke. She confronts Rayburn about his keeping the President in the dark about the CTU situation, and Rayburn threatens her not to cross him. When Palmer comes into the O.C., Lynne tells him the news. Rayburn tries to explain that alerting CTU would expose Jack. He had CTU transfer their intelligence, so that the only losses would be infrastructure and personnel. "Those losses are unacceptable," Palmer says, and he orders Lynne to notify CTU immediately. Rayburn tells the President that he believes he is making a mistake.
Michelle gives Tony the note from the telephone worker about the bomb, and Tony orders an immediate evacuation of the building. He gets the call from Lynne, and asks if this is the reason NSA wanted their data. Kim and Megan are escorted out of the building along with the other CTU workers. Tony runs up to Mason's office to save Paula, who is still trying to complete the data transfer. They are caught inside the building when it explodes. Eddie and the crew watch CTU from a distance, and congratulate themselves when they see they smoke cloud rise above the building.
A HAZMAT doctor informs Mason that he has inhaled a high level of enriched plutonium. He may only have one more day to live.