On Princess Celestia's request, Derpy Hooves must go on a mission to unite two very different cultures. But how will she convince them to put aside their differences and make amends? Especially after how much trouble they've caused each other. And what is so special about Derpy that makes her the right mailmare for the job?

What began as a simple delivery job will quickly become a matter of Equestrian security.

Cover art image by Veggie55: link