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.
KC and Marshall investigate the theft of a precious emerald, brought by representatives of the Chinese government to bring luck to two baby tigers born at the National Zoo.
"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"--