Twilight Sparkle thought that she'd succeeded in curing Fluttershy of the bat's influence, but she was wrong, and she must pay a nightly price to keep her friend alive.
I could have saved her. I could have saved my friends. I could have saved ponies. But instead, I kept hush. And I don't know how I can open my mouth to scream.
So, it appears the rumors are true...DJ Pon-3 and even Rarity have been bitten by bat-ponies...vampire ones! Vampire bat ponies are now common in Equestria, but who would have thought that two heroes would have been affected by them?!
While in Trotsylvania, a mare by the name of "Fluttershy" meets a gentlecolt named "Dr. Van Helstallion" and must be protected from a vampiric demon who is, not only, persuing her, but killing other young mares in the village.