Life in Equestria is good, no villains plotting world domination, no dragons, and no freak natural disasters any more thanks to 6 little ponies, who have now made some very close friends.
Chrysalis, having found an ancient changeling magic, uses this against the six ponies who de-throned her, and uses the one thing they wont suspect as her tools of revenge, the coltfriends of the ponies. Using this magic she has them utilize the greatest power in Equestria, the Elements of Harmony, against they're owners.
Origina story idea came from my friend Cody Davis, Co written by him and myself.