For nights, Lyra had been having strange dreams of voices calling to her. After confronting with her roommate, Bon Bon, and running into two of their other friends, they decide to go to Canterlot to ask the Princess about Lyra's dreams. Shortly after, there is a new threat, and not even the Princesses, all four of them, can stop it. Instead, they must rely on an unlikely mare. But how can she stop the villain?