You've lived in Gravity Falls since you were a child and you've noticed how strange everything is. You tried to figure out what was the origin of so many supernatural activities but since you're not an expert your studies have only led you to find an old book... in the book you have found a ritual and out of sheer curiosity you proceed to do it, a yellow, two-dimensional, triangular creature with one eye, a black top hat and a black bow tie appears in front of you... "it is good to be back!"