When the entire town of Ponyville ends up either dead or missing, Princess Celestia can't let the rest of Equestria know about the truth. The only answer: grab someone from beyond their dimension. This is where Max Bishop comes in. When he's taken into Equestria to investigate, he'll find that Equestria is more than just rainbows and butterflies.
Thanks to Rainshine for proofreading this for me. She is best Grammar Hyena.
Also thanks to Beti-Young - http://beti-young.deviantart.com/ - for the awesome cover art.