National sprint champion Na Ae-ri, who once dominated the track, transfers to Bitnari High School, where she reunites with her only defeat—former gold medalist Hany. The two enter a special urban race called "Street Run", set in the heart of the city, where they face off against the rising star Ju Nabi. With Ae-ri's fierce comeback and Hany's unyielding pride, can either of them claim victory? A heart-pounding race begins, with the title of national youth representative on the line.