Now a high school junior, Samantha tries to decide whether to continue dating David, the Presidents son, as she juggles a real job, art lessons, and a trip to Camp David for Thanksgiving.

KC and Marshall throw a Halloween party at the White House, wake up the next day to discover fake, damaging photos of President Thornton on the Internet, and try to help save his election.

KC and Marshall run across a forgotten cubbyhole while painting a closet at the White House and find a box of toy horses that once belonged to Thomas Jefferson; when they go to Monticello to return the horses, the box disappears, and they explore the building and grounds to find the thief.