New to the pony club, Penny Prévost is excited to ride Donald for her first riding lesson. However, Donald is the favorite pony of Élisa Thibaut, the director's daughter. She does not see this newcomer with a very good eye and decides immediately to mark her territory. Thankfully, Penny can count on the support of Emma and Matt, two other young riders who will become her allies. Joining forces, will they be able to tame the formidable Élisa?