Something strange is happening in Ponyville.
Lyra has gone missing, leading Bonbon to search Equestria for her best friend. From under her bed, Fluttershy finds a stone--the likes of which wants nothing but everypony's total submission to paranoia.
But when one thing happens in one world, something of equal significance must happen in its sister world.
And in Equestria's sister world, things are no better. Dark forces have invaded the land, taking over the minds and bodies of innocent creatures, using them as pawns in a war of power. As a result, the island's people are left with little hope for their safety, their security, their future.