colester88
You know the Pines family, Dipper, Mabel, and Stan. You know how they went to Gravity Falls last summer and solves its mysteries. Well, guess what. Bill snuck into their house back at their parents' and wiped their memories, so they remember nothing. However, he made a mistake and got himself removed from the universe, and now he can't come back unless someone summons him. And now, Dipper and Mabel are about to spend another summer in Gravity Falls. After what Bill did to them, they don't know the towns's secrets anymore.
But who said they can't discover them again?