Prologue

While exploring Mount Ebott(which was one of the mountains that surrounded Gravity Falls), the Mystery Twins Dipper and Mabel accidentally fell into a huge pit, which led them into the underground where the monsters lived and roamed around. Will they be able to make it out alive without hurting anyone? Or will one of them slowly turn into a megalomaniac?
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I DO NOT OWN ANY OF THE CHARACTERS
ALL OF THEM RIGHTFULLY BELONG TO ALEX HIRSH/DISNEY AND TOBY FOX