After years of fighting on the battlefield, Lightning McQueen (voiced by Owen Wilson) has long become an experienced veteran. For him now, the race is more like a gathering with old friends, and everyone enjoys the fun of running wildly. However, this harmonious scene was soon broken by the cruel reality. The next generation of high-tech racing cars represented by Storm Jackson (voiced by Armie Hammer) entered the arena one after another. They eliminated the old generation of racing cars one by one with better performance and high-tech assembly and transformation, even including the king McQueen. Four months later, the injured McQueen decided to come back, and he was transferred to Sterling (voiced by Nathan Fillion) by the sponsor who had cooperated for many years. After accepting a new transformation from the inside out, McQueen started training under the supervision of coach Cruz Ramirez (voiced by Cristela Alonzo). However, he faced a severe test. If he could not win the next game, he would have to retire from then on. There was little hope. Could the unyielding McQueen regain the glory of victory...