April, 2016, and just as Dipper and Mabel are ready to go to Gravity Falls for the occasion of Wendy's Senior Prom, a future old enemy pops up to force a change of plans.
Gravity Falls - Rated: T - English - Adventure/Mystery - Chapters: 18 - Words: 42,045 - Reviews: 67 - Favs: 17 - Follows: 15 - Updated: 9/19/2018 - Published: 8/26/2018 - Dipper P., Mabel P., Blendin Blandin - Complete