Twilight Sparkle discovers the human science of advertising. Being Twilight, she can't help but propose a new ad campaign to Princesses Celestia and Luna promoting the Conversion Bureaus. And being Twilight, neither can she resist pulling the mane six into this little project, and then taking things a bit too far.
As usual, Princess Celestia takes all of this in stride, knowing she can cope with anything Twilight dreams up. Or can she?