Princess Luna, only recently recovered from the events of "Friendship is Magic: Part Two," is struggling to adjust to life in present day Equestria. And Captain Bucephalus, Commander of the Lunar Guard, is having a little trouble adjusting to having a Princess to look after.
This was my submission to Equestria Daily's "Happy Luna" competition. After "Luna Eclipsed," it no longer conforms to the series' canon, but I'm fond of it anyway.