Cheerilee is trying to get her mind off her encounters with Princesses Luna and Celestia. Unfortunately, there's always another princess. And of course she's been drinking.
After a long night of partying at Sweet Apple Acres, a seriously drunk Rainbow Dash decides to head into town in search of food. It goes downhill from there.
Curiosity finally gets the better of Princess Luna, and she slips through the crystal mirror to the human world. She finds a liquor store filled with what looks like bottled magic potions and wants to test them, of course. What can possibly go wrong?
Princess Celestia is coming to Ponyville to be the guest of honor at the Summer Sun celebration, and in recognition the Mayor has ordered an enormous apple cake. However, Mr and Mrs Cake leave Pinkie Pie in charge and things don’t go quite to plan...
Pinkie's Cocaine dealer is an anthropomorphic cat named Thrilla Vanilla. Things don't go too well for him. A cursory discussion of Equestrian drug culture and policy also occurs. And also interspecies breeding.
Twilight must hunt down the booze of the Goddesses if she is ever to get drunk again, following the discovery that her divine biology is unaffected by the usual stuff.
Rarity can clearly see just how good of friends Applejack and Coloratura are. Even if they had a deep connection as fillyhood friends, hadn't Rarity and Applejack once shared that too?
As Apple Bloom escorts a drunken Applejack home, Applejack decides to tell her the story of how Equestria came into existence. What little of it she can remember, anyway.