KC's mother and the clone of the President of the United States are kidnapped by disgruntled astronauts who want to take over the International Space Station.

KC tries to uncover the White House spy who is leaking secrets about the upcoming wedding of her mother and the president. KC₂s mom is getting married - to the President of the United States! KC wants the day to be perfect, but someone keeps leaking wedding secrets. The newspapers have even printed where the president and his bride are going on their honeymoon. To save the wedding, KC and Marshall must track down the spy in the White House!

As they leave a Fourth of July celebration with the President of the United States, KC and Marshall see unauthorized fireworks at the FBI Building and decide to unmask the culprit and his plans for blackmail.

When KC and Marshall see lights flickering at night in the Washington Monument, their investigation turns up a monkey, a hole in one of the monument stones, and a hundred-year-old mystery.

When doctored photographs of the President of the United States appear after an innocent Halloween party, his stepdaughter KC and her friend Marshall have to find the culprit in order to save the President's chances for re-election.

KC and her friend Marshall accompany KC's stepfather, the United States President, to remote Camp David, where they find clues that point to either ghostly or criminal activity.

"KC and Marshall convince the President of the United States to pardon more than one turkey for Thanksgiving, but all 117 of them are stolen off the National Mall"--