"Grand Prix" covers the world of horse racing, centered around the romance between a male horse jockey and a female horse jockey.
Seo Joo Hee (Kim Tae Hee) is an ambitious equestrian who loses her beloved horse in a racing accident and also injures her arm. Devastated she quits the sport and travels to Jeju Island. On Jeju Island, Seo Joo Hee meets fellow equestrian Woo Seok (Yang Dong Kun), a former winner of the Japan Cup, who has also experienced a similar slump as Seo Joo Hee. With Woo Seok's help, Seo Joo Hee becomes inspired to compete for the Grand Prix Championship.