I was just riding home and got in a little accident. I got myself back up and walked the rest of the way, no big deal. Was that a pony over there? Why is my vision going funny? Something's going on and I don't understand what went wrong!

A human soul is pulled into Doctor Fetlock's schemes to fill a hole for her paying customer. He answered the call, so he must be the right one to play the part of a mail mare for her client, who demands a pony to teach him the secrets to success.

Reading the other stories in the series is not essential but is recommended.