Time has blessed Twilight Sparkle and her friends. As the years have passed, they have achieved dreams, pursued passions, and thrilled in one another's successes. But time has also caused the six ponies to drift apart as their lives begin to lead them in different directions. Now only Twilight is left in Ponyville, and she cannot help but wonder if she has lost a part of herself along with her friends.

But the discovery of a changeling infiltrator incites sudden conflict. Twilight must quickly prepare to repel a second changeling invasion by herself. The others, scattered across Equestria, find themselves under attack as they seek to escape these foes and reunite with their friends. Every familiar face could conceal an enemy, every conversation could be a lie, and each pony must search her own heart as lines blur between appearance and reality, between what a mare does and what she truly is inside.

This story was originally conceived and planned during Season 5, so it does not take into account the finales for Seasons 5 or 6.