The ponies of Equestria are organizing a concert in Canterlot. While Octavia is brainstorming with Twilight, the book, once more, summoned our Equestrian heroes for another adventure. This time they will be sent to a special place that connects to worlds that are created by classical music. Worlds that contain massive dinosaurs, a mouse who wants to be a great sorcerer and a terrifying monster with great control over the darkness.