Grumpy cat has a grumpy life. He likes it that way. He becomes particularly grumpy when he is unexplainably sucked into a horrifying realm known as "Equestria". How awful.

Rarity and Pinkie Pie both seem to need something from the Everfree forest, and so they decide to find what they both need together. However, they both accidentally unlock some dark magic and major changes happen. They switch bodies.