When a postcard arrives in the mail, Dorrie is sent away to Gravity Falls, Oregon for some 'family bonding time' with the Corduroys. Dorrie wants nothing to do with Gravity Falls or her cousins, (particularly her cousin Wendy, the perfect girl she could never be) but when she stumbles upon the Mystery Shack and their inhabitants, Dorrie finds herself falling deeper and deeper into the mysteries in the town of Gravity Falls.