The Castle Of Friendship is mysterious to it's inhabitants and those who live in Ponyville alike. Twilight Sparkle's curiosity has led her to explore it many times. With it's many doors, it was a fountain of curiosity. But one door never opens.

Twilight tries to open it, and fails every time. What she does not know, is that she has been in there before. And being in there only leads to insanity. She will soon understand this.

Inspired by The Haunting Of Hill House series on Netflix.