Lionel "Pops" Racer, a mechanical engineer and visionary car designer, created the Mach 5—a cutting-edge racing machine powered by the experimental "X Engine." After a tragic testing accident claimed his eldest son Rex’s life, Pops rebuilt the vehicle with reinforced safeguards dubbed the "Safety Seven," integrating critical defenses against racing’s deadliest risks. This overhaul marked his shift from unbridled innovation to a relentless focus on protecting those he loved. The rebuilt Mach 5 retained its original X Engine, which endured the crash unscathed. This engine’s hidden potential gradually unraveled into a global conspiracy, its ramifications explored by the Racer family as they untangle the secrets embedded in Pops’ design. His younger son Speed, honoring Rex’s legacy, pilots the enhanced Mach 5 in professional races while confronting the dangerous truths behind its technology. Pops embodies the tension between grief and ingenuity. His technical brilliance and devotion to family converge in the Mach 5’s dual identity—a marvel of speed and a fortress of protection. The X Engine’s unforeseen global stakes underscore both his engineering legacy and the perilous ripple effects of his life’s work.