Picking up right where "Road Trip" left off, Rocky Pebbles finds himself in a whole new body, being now a unicorn. Brim, on the otherhoof, has turned into a goat to his dismay. They are let loose with the help of Sunset Shimmer to guide them before running into a familiar foe while visiting the new Princess Twilight. Leaving the Princess frozen in stone, it is up to Rocky and the gang to help save Equestria from being engulfed by the Hellfree Forest. All while learning to use their magic in the process. Sounds easy doesn't it?