Castling is a special move in chess where a player’s rook ends up just next to the king. Thanks to a friend’s kindness, a calculating young filly would end up closer to her princess than she ever thought. But can a filly like Cozy Glow be changed?
These are the ordinary days in the extraordinary lives of Cozy Glow, Rumble, Flurry Heart and their friends as they learn, play and grow under Twilight's tutelage.
Cozy Glow was a Princess, and she has vowed to become one again. Flurry Heart is and alicorn and destined to become a Princess one day. Can they help one another grow, or are there some gaps that not even the magic of friendship can bridge?