HAY, FURST TRAI AT DA COMEDEH. LUFF EET.
We've all been told to never judge a book by its cover. Sometimes, what you figure out is that even if the book has a bland and boring face, it may have some exciting and interesting things within.
After being run out of Ponyville, the two brothers return to their shop to get things sorted with their machine. They realize that their lovely invention could be used for revenge against those that had wronged them!