During an errand given by Princess Celestia, Twilight Sparkle and Discord discover a wanted sign for an assassin that connects to a murder case earlier on in Twilight's childhood.

The murder case of the Super Intendent of Manehatten. Now, Twilight goes on a quest to find the murderer to right this injustice, but various obstacles prove to make that a problem.

Due to a mysterious unnatural disaster on a trip to Cloudsdale, Rainbow Dash and Fluttershy find themselves as humans in a strange world surrounded with the concepts of witches; beings of despair that pollute the hearts and minds of depressed humans.

And what's with the white creature asking them to make a wish and become magical girls?

Cover art done by me.