Set in an alternate version of the Ponyville we're familiar with, Cupcakes: The Musical blends elements of our favorite horror story with the musical fun of Sweeney Todd: The Demon Barber of Fleet Street. Here's the story:
This musical tells the story of Pinkamena Diane Pie, alias Pinkie Pie, who returns to Ponyville after 15 years' exile to the Everfree Forest on false charges. When she learns from her former landlady Rarity that her best friend has died, due the actions of the friendship-hungry Judge Twilight Sparkle (who's bought the "loyalty" of Rainbow Dash), she vows revenge in the best ways she knows: through baking and singing!
Credit goes to Stephen Sondheim and Hugh Wheeler for the 1979 musical from which the music is drawn and Sergeant Sprinkles for the story from which this draws inspiration.