Based on the fairytale, King Grisly Beard.

As a Princess, Rarity must choose a husband. However, she judges by appearances and soon rejects all her suitors.

Her father, King Discord wants his daughter to learn a lesson in kindness and hard work, so he marries her off to a poor farmer called Big Mac.

Poor Rarity. How she wishes that she had married King Mumble Grumble, who owns the land that Big Mac rents for his farm.

Even so, there are still many surprises in store for her...