The Genius Files: The MixUp Mission is a thrilling prequel to the series written by Dan Gutman. The story introduces the adventures of 12-year-old twins Coke and Pepsi as they embark on a cross-country vacation with their parents, only to be chased by an evil villain who is bent on stopping them. With the help of their genius intellect, the twins take on secret missions, using their wits to outsmart their enemies.