: Theo and Chet are captured by Tito, a taco truck driver who enters Theo (now renamed "Turbo") into snail races. Tito eventually realizes Turbo's potential and, with the help of a group of streetwise racing snails, decides to enter him in the Indianapolis 500 .
: In the final laps, Turbo's shell is damaged, and he loses his super-speed. He must rely on his natural snail instincts and the encouragement of Chet to cross the finish line just ahead of Gagné, proving that no dream is too big and no dreamer is too small.
Theo spends his days working in a tomato patch and his nights obsessing over his idol, five-time Indy 500 champion Guy Gagné. His life changes forever after a freak accident on a freeway, where he is sucked into the supercharger of a street-racing car and his DNA is fused with nitrous oxide. This grant him incredible speed and various car-like abilities, such as headlights and a radio.