Sunset shimmer and her friends have finally gotten used to the crazy magical events that have been periodically showing up to disrupt the peace of the human world. They have learned to deal with the dangers that magic from Equestria has been causing and accepted it as a part of their lives.

So, now that they know how to use magic and respond to problems of that nature, it should all be smooth sailing from now on....right?

Unfortunately, life is never that simple.

The girls must learn that Equestria isn't the only source of problems.