Isoseismal Emanations

At the end of Infinitesimal Variations, a newly semi-reconciled Ford and Stan Pines had allied with Soos Ramirez and, to a mutually reluctant extent, Agent Powers in a last-ditch effort to end the Weirdpocalypse before it could spread. Meanwhile, Dipper and Mabel, along with Old Man McGucket and his son Tate, were trapped inside the city limits, whereabouts unknown. Now, the Pines-McGucket party struggles to survive in the wasteland while the Pines-Ramirez-Powers party heads out on a quest, searching for the information they need to save their families and/or the world and trying to get killed by neither wildlife nor each other. Along the way, they all encounter old friends, old enemies, and others, all while trying to answer questions like: how can the weirdness be combated or avoided? Where and who are the survivors? And as the stakes grow ever higher: who can anyone trust?