After a tragic accident claims the life of racing driver and motor engineer Kenich Hibiki during a test drive of the Mach, his father Daisuke salvages the wrecked car as a memento. Years later, Daisuke reconstructs the car, now known as the Mach, with a revolutionary safety system called 'Safety Seven' to protect the driver. The Mach, powered by the miraculous engine 'X' that survived the crash, is now driven by Kenich's determined younger brother, Go. As Go races in the Grand Prix, he not only honors his brother's legacy but also emerges as a rising star in the world of racing.