In a remote corner of Equestria, the lessons writ by balefire have been forgotten. For the very same reasons zebras and ponies nearly obliterated each other, the donkeys of Kansass and the ponies of Missurrey stand ready to repeat the past. Into this simmering border war wanders a mule on her own mission.

As soon as she remembers what that mission was...

(Thanks to Kashin for the cover image)