bella cipher went to gravity falls to see Dipper (Mason) and Mablebut inside of her friends she sees her little brother bill has taken over the town and is trying to get into the world.
For most of his life, Dipper has been locked away inside his castle in the kingdom of Gravity Falls. Isolated from his older sister who he once was so close to. He never knew why they were no longer close but on the day or her corination he finds out more than he bargained for.