Mack Williams was the next big thing in motorsports. Until her wild ways forced her to leave racing in her rearview mirror. Ten years later, she’s a single mom in rural Indiana, with a struggling family business and a dad who needs full-time care. The fastest woman on four wheels now drives car pool, her dreams turned to dust. But Mack’s childhood idol, Janet Joyner, still sees the spark. Famed for breaking gender barriers on the track, Janet gives Mack a last-ditch chance to qualify for the coveted Indy 500. Mack thought her days of impulsive choices were over, but she can’t say no, whatever the risks.