Twilight asks for assistance from Fluttershy which a spell malfunctions. Fluttershy is warped into a strange world a bit like hers, except the strange monkey-like creatures are out to find her. Will she be able to get home? Or will she forever remain on the run?

One day, the CMC decide to become the "Cutie Mark Crusader Myth-busters". The only problem is that there is no myth to debunk. That is until a rumor spreads around the school discussing a mysterious carnival deep within the forest. When the girls arrive at the carnival, they are greeted with the clever feline Catherine! Will her carnival be a fun experience for the crusaders or will it leave each of them literally breathless?