Olivia has a dream: She wants the five Friends to win the legendary Heartlake City go-kart race in the coolest cars ever. There's only one problem - All they have are five worn-out go-karts to work with. How can they beat reigning champion Vicky Roman in those old wrecks? It's time for some good old teamwork. Can the Friends design, upgrade and customize their go-karts in time ...