Moondancer has always thought highly of Twilight and was devastated when she left without saying good-bye. When Twilight throws a party for Moondancer and rekindles their friendship, Moondancer decides she wants more.
After returning to Canterlot to teach Moondancer the Haycart Technique, Twilight and her friend decide to catch up. Moondancer tells Twilight something that she never would have expected.
Moondancer moves to Ponyville after her house is damaged by plunder vines to stay with Lyra Heartstrings, an old school friend. But when she runs into the newly-crowned Princess of Friendship, she finds that her feelings aren't quite what they seem.
Twilight's just gotten back to Ponyville after amending her friendships with her oldest friends. She's happy about that, but still there's something nagging at her.
Moon Dancer was content. Old friends back, getting new ones, having parties, all while still having her studies. But there's still something missing, in the form of the mare who made her realize that there's more to life than dusty old books.