Out in space there was a ship that carried ten ponies. Two of them changelings. Together by order of The Queen, they plan to trap everypony in unbreakable cocoons and leave them helpless. Can Derpy, one of the few, find the Impostors?
After Equestria is overthrown by a virus, making the ponies infected turn into blood craving killers, the Mane Six, in a hope of surviving it, stay locked up in Twilight's castle to wait it out. But what if there was one of them out for blood?