Rodičia pošlú dvojičky Dippera a Mabel na leto k prastrýkovi Stanovi do Gravity Falls, kde deti zistia, že sa v meste deje niečo veľmi zvláštne.

Marianne is in bed after falling from her horse. She occupies herself by doodling in a sketch book, drawing a boy inside a bare house. When Marianne falls asleep, she finds herself outside the very house that she drew.