Pony by day, bat by night. That was the promise Cale made with Fluttershy after a misunderstanding between Toby, Lightning Dust, and Flutterbat. But on Nightmare Night, something happens to Flutterbat. And that something could possibly break the promise. Will Toby still be unaware that Flutterbat and his mom are the same? Or will he find out tonight that they are two completely different mares?