"It was like a shadow. A blur, a memory of a dark-pelted pony with a cyan mane, zooming past so swiftly that Angel wondered whether he'd actually seen it. But he had, because Rainbow Dash had seen it out of the corner of her eye, and inclined her head slightly to catch a clearer glimpse. As she did so, Angel did too. The dark pony turned back and stared with crystal eyes, that seemed to paralyse Rainbow Dash. And then, the shadow pony was gone."

An unexpected turn of events sends Rainbow Dash into the darkest depths of Everfree forest with an animal she barely likes and no wings to fly to safety. The mane six have been concentrating on a decoy, little do they know that in an innocent Ponyville, disaster strikes in the form of a demonic mare who wants revenge. All kinds of unicorn magic are rendered useless, but with the mane six split up, and when the skies are dark Rainbow Dash thinks she can't call on the only magic that can save Ponyville; the magic of friendship.