Olympia, 5th century BCE: in a few weeks, young Philos will participate in the horse race at the Games. As a girl, his sister Thalia won’t even be allowed to watch. She puts her talent as a horsewoman in the service of her brother and Petia, a spirited stallion who can be unpredictible. She is convinced that he can lead them to victory. But when Petia is injured, it's up to Thalia to save the day. Will she succeed in healing the horse and proving her worth?