Dipper is self-conscious that Mabel is taller than him and seeks a magic solution. Meanwhile Lil' Gideon takes advantage of Dipper's and Mabel's height discrepancy.

Li'l Gideon swindles the Mystery Shack away, forcing Grunkle Stan and the kids to move in with Soos. While Stan weighs how he can still care for his grandniece and nephew, they decide to take on Gideon.

The kids, along with Old Man McGucket's help, discover there is a secret society in Gravity Falls.

When Grunkle Stan decides to run for mayor, Dipper and Mabel have their work cut out for them trying to turn their gaffe-prone uncle into the perfect candidate.

Ford discovers Bill’s true motives and a final confrontation with Bill leads to the Pines family’s ultimate fate and greatest sacrifice.