Dipper and Mabel

A giant, red-skinned figure with an axe stands before a gas station sign in a forest, followed by a view of a mysterious cabin in the woods, then the title card for "Gravity Falls," a pair of hands holding a journal with a hand symbol and the number three, two children looking at a counter with a "No Refunds" sign, and finally a boy in a hat and a gnome-like figure in a car.