The adventures of 2 Pegasus ponies. Superliner, a railroad fanatic, and his wife Solatune, a lead flute player for the Cloudsdale orchestra, are caught in multiple problems involving a non-pony pulled train called the “The Equestria Express”. The passengers on the train include Princess Celestia, Princess Luna, Octavia, and many other high class ponies. Superliner and Solatune must work together to resolve problems that are caused by the train.