Dipper and Mabel are twins in a town called Gravity Falls. They're pretty average almost-teens, except for one key difference: they have the key to the Armageddon in their basement. One day their great uncle Ford approaches them, saying that the end of the world is almost upon them. To stop it, he must travel through an inter-dimensional portal to the nightmare realm to stop it. However, when Mabel falls through the portal and Dipper follows as the portal closes behind them, they see just what the nightmare realm looks like. They had imagined what it had looked like: a realm of fire, demons, and death.

What they DIDN'T expect was a land of talking horses.

[Rating may or may not change to T later]

This is not a rip off of "Written in the Stars." It has a similar starting premise, but it's not the same. It will branch off into a completely separate story very quickly. I came up with the idea before the story was published, and the author of said story is aware of that. So please, no flame.