Dipper and Mabel return to Gravity Falls, Oregon for the next summer after the Bill Cipher event. But when they return, an alien spaceship crash lands in Gravity Falls one day. The same alien spaceship that abducted Phineas and Ferb. They learn of Ford’s great intelligence and kidnap him to force him to repair and upgrade their ship. So, Dipper and Mabel must team up with Grunkle Stan, Soos, and Wendy to save Ford.
