The Thornberrys are in the Galápagos Islands! And rival filmmakers, the snotty Leo Léon and his family, have challenged them to see who can be the first to trace Charles Darwin's original route. Eliza, her parents, and her sister are dumbfounded. How can their Commvee compete with the Léons' fancy high-tech vhicle? Can they win the race whithout having to (gasp!) play tricks? Find out in this exciting adventure with everyone's favorite family of globetrotters!