A North Korean pianist announces his intention to defect in the Oval Office. While the staff passionately debate his request they also fight to get the President's choice of Vice President nominated by a new and hostile Speaker of the House.

The entire Bartlet family tries to gather for an early Christmas dinner at the White House, but inevitable delays occur as the president must deal with an overseas crisis. Ellie is held up at her lab, and five-year-old grandson Gus is having tantrums. In addition, Doug Westin (Jed and Abby's son-in-law) approaches Josh about running for an open congressional seat in his home district. Josh, Leo and the New Hampshire Democratic Party have already chosen a viable local candidate, but Doug persists. Jed, who likes and respects Doug, still thinks it's should be Liz who should run for the open seat.

Bartlet travels with former presidents Newman and Walken aboard Air Force One to the funeral of another former president. Meanwhile, Leo sits in the situation room dealing with demonstrations that are wracking Saudi Arabia and threatening to topple the royal family and CJ tries to deal with rumors of military mind control experiments. On board the plane, Toby tries to write Bartlet's eulogy as the crisis in Saudi Arabia grows worse.

A Navy Hawkeye AWACS crew is missing in North Korea, a Broadcaster has called CJ a chicken and a proposed tax break for stay at home moms causes Josh stress. Amidst the usual West Wing mêlée, Leo finds himself hearing things about the man who saved his life in Vietnam, that he doesn't believe.

A fact finding codel to the Middle East is torn apart by an explosion. Key members of the administration and their loved ones are caught in the mess. The President is forced to consider retaliatory military action in the unstable area, with possible repercussions that could last decades.

The President finds himself at odds with Leo, and the entire country, on his position regarding retaliation for the bombing in Gaza.

Magicians Penn and Teller give a controversial performance at Zoey's birthday party in the White House that threatens to drown out the news of the impending China trip. President Bartlet goes to New Orleans on his way to China after unexpectedly requesting briefings be postponed until they are in the air. Josh tries to decide which Democratic presidential candidate he wants to support, and is alarmed that Bartlet wants to appoint California Republican Senator Arnold Vinick to be Ambassador to the United Nations.

President Bartet's attack of multiple sclerosis requires hasty reorganization of the summit in China. Unable to endure the long meetings, he becomes frustrated when the Chinese take advantage of his absence to drag their feet over North Korea. Back at the White House, Josh is told by NASA that a large asteroid is on a collision course with earth; staffers are unsure whether to prepare for the end of the world or not. Donna becomes frustrated when Josh continually postpones what she says is an important conversation. With the New Hampshire primary looming and Vinick looking like a formidable opponent, Josh and Leo try to find a Democratic presidential candidate they can believe in.

The Santos campaign's difficulties with the black community continue when a Latino police officer shoots a black child; C.J. offloads preparations for Ellie's wedding to Will when Kate needs her help with Kazakhstan; Josh visits Toby.

The Vinick campaign struggles with the impact of the nuclear accident in California; Josh and Donna have a "moment".