One day, the Elements of Harmony mysteriously explode, causing all of the unicorns in Equestria fall under a trance which makes them leave to an unknown location. Celestia must know what's happening, so she sends Rainbow Dash, Fluttershy, Applejack and Pinkie Pie on a journey to find answers and save the unicorns.
However, when they all get caught, Equestria falls into one pegasus' hooves...