The summer riding festival is coming to the Horse Farm, and it is sure to be an important event for close friends, Ina and Tine to showcase their equestrian skills. The only problem is that the girls need a third rider for their plan to take shape, and the snooty mean girls, Bettina and Sarah seem to be their only option. That is until a new rider Alexandra, and her horse Lilian show up at the farm. Have Ina and Tine finally found their third Musketeer, or will Bettina and Sarah chase Alex away with their cruel antics?