Summary: When a 12-year-old girl comes to Gravity Falls and befriends the Pines twins, it seems to good to be true. Their seems to be something off about her...
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Dipper was sitting in a field and a glowing orb was floating in front of his face. It suddenly brightened and expanded, taking on form of a girl. A group of butterflies appeared next to the glowing girl. She smiled down at Dipper and a heart-shaped leaf blew into his hand; the butterflies flew into her mouth. The girl laughed and he could see them flapping their wings in her stomach. A little breeze came whispering a word. Deity. Deity.
The girl laughed an angelic laugh and the leaf split into two parts. A black hole broke open under Dipper and he was falling. Falling through infinite darkness. Screaming but no sound came through his lips. Forever trapped in a-
"Dipper! Breakfast!" screamed Mabel
Dipper's eyes flew open. Only a dream just a dream, he reassured himself.
Out of the corner of his eye, Dipper noticed something peeking out of the corner of his pocket. A half of a leaf. A heart-shaped leaf.
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This was just the prologue.