Magical Pony #2: The Russian Circus

Vigga and Mom are flying to St. Petersburg, Russia. Vigga brings Luna, but keeps her hidden in a bag, because she doesn't want the passengers to see her. In St. Petersburg, they go to a grand circus show, where Vigga sees a beautiful horse perform. But something's wrong. This horse is not well. Now it's up to Vigga to find out what's going on.