Twilight Sparkle wakes up in a claustrophobic prison: A grey cubical room with no doors or windows. Where is she? Where are her friends? How did she get there? How is she going to get out?
Fluttershy's life takes a turn for worst when she discovers a mysterious and creepy black figure following her, and there's no escape. What is it? What does it want? Why is it following her? Why is she the only pony who can see it?