Szandi, the foal, always suspected that she was different from the members of the Zöldellő völgy stud. He runs the fastest and is the only one interested in what can happen in the forbidden area, beyond the trees bordering the valley. In addition, he always feels as if the sky is calling him... One day at school, something strange happens to him, which proves that he is literally different from the others, and the wonderful adventure begins: Szandi discovers who he really is.