There comes a time when the light must go out; but how do you know if you've burned brightly enough?

Many years after sending her beloved protege to Ponyville, unease sits heavily on Princess Celestia's heart as her relationship with Twilight Sparkle seems to have cooled despite all they've accomplished together. On the advice of her sister, Celestia sets out to investigate and resolve the lost connection with her most faithful student. What does it mean to be a Faithful Student...or a Princess of the Sun?

Earned a six-star rating on Equestria Daily and featured on its very own TVTropes page!.

When Twilight receives a letter from Princess Celestia asking her to come to the castle for something very important, Twilight is puzzled. What Princess Celestia and Luna have to tell her will change the Unicorn's life forever.

"I've missed you around here, Twilight."