Tobey Marshall is a former race car driver who owns a garage named Marshall Motors in Mount Kisco, New York where he and his friends tune performance cars. Struggling to make ends meet, he and his crew participate in street races after hours. After a race, Tobey’s former rival Dino Brewster arrives at their garage with an offer to complete the build of a rare Ford Shelby Mustang worked on by the late Carroll Shelby. Dino wants Tobey and his crew to complete the project in exchange for 25% of the car’s estimated selling price of $2 million.
The completed Shelby Mustang is put up for auction at a party. Tobey and Dino meet Julia, an English car broker whose client will purchase the car if they can go prove it will drive over 230 mph as Tobey claims. Tobey volunteers to drive the car, but Dino objects and orders him not to. The next morning Tobey gets the Mustang to reach 234 mph, leading Julia’s client Bill Ingram to purchase it for $2.7 million. After Julia and Ingram leave, an enraged Dino confronts Tobey for driving the car after being ordered not to.
Dino challenges Tobey and Pete to a race after Pete flatly tells Dino that everyone knows Tobey is a better driver than him. Dino offers to give up his entire share of the Mustang sale if Tobey wins, Tobey agrees to forfeit his share if Dino wins. The three race on the interstate in three illegally imported Koenigsegg Agera R. During the race, Dino realizes he will lose and intentionally bumps Pete’s car, flipping it into a ravine and killing Pete when it bursts into flames. Dino disappears from the scene, and Tobey is sent to jail for involuntary manslaughter after no one can prove that Dino was there.
Two years later, Tobey is released on parole and sets out to avenge Pete’s death. He borrows Ingram’s Mustang to enter the De Leon, a winner-takes-all supercar race organized by the mysterious Monarch. As a condition, Ingram requires Julia to accompany Tobey with the Mustang. The pair have to reach San Francisco before the race starts in two days, but first cause an interstate chase with police and upload the footage, leading Monarch to offer the invitation for the De Leon. Dino offers his rare Lamborghini Sesto Elemento to anyone who can stop Tobey from entering the race.