After Dipper and Mabel get married and burn down the Mystery Shack, Pacifica summons Bill Cipher from this ten-year banishment to the universe of Gamer's Guide to Everything to take over Oregon. The Mystery Twins must work together with the ghost of Grunkle Stan and the crotch of the executive producers of every Disney Channel sitcom ever to save the day in a feature-length event that takes them across the Disney multiverse.

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