Celestia is totally exhausted working hard day in day out, and eventually decides to use magic to get herself some much-needed rest. The spell she uses is a mite too powerful though, and isn't she in for a shock when she wakes up....
Twilight needs to brew a new brew of Zecora's potion of Alicorn remembrance... Unfortunately for her the key ingredient must come from an inconvenient source: her brother's stallionhood!
The Princesses discover a far-off kingdom of strange magic and foreign creatures, and decide to investigate. Once again, Twilight Sparkle is left behind. And ONCE AGAIN, she has to write the apology letter.
Celestia's reminders are just... so perfectly placed. Love it!