You are in a different dimension then the Pines Family and you find yourself reading the infamous Third Journal from your favorite TV show, Gravity Falls. In your normal Earth dimension, Gravity Falls doesn't exist and is a beloved TV show loved by many people all over the world. But something happens and you fall into a dark vortex and you land into a different dimension, right in Stanford's lab in the basement of the Mystery Shack. This is set right after Weridmagedon.