With the 6 month probation period of Equestria's entrance to ASAN (Association of Animated Nations) ending, Celestia must fulfill a requirement: make accommodations for a liaison between Equestria, other ASAN nations, and the earth king himself (who decides who gets to be a liaison).

He chooses one Joseph Crowe, a young man fresh from the military academy with a rough past. before long he starts turning heads and getting involved with equestrian affairs and captures the heart of a princess

….untill one day his past comes back to haunt him.