Four years after Weirdmageddon, Dipper and Mabel Pines have come to Echo Creek to investigate and document Princess Star Butterfly and her magical struggles against the Forces of Evil. Ready for a long, weird school year in Southern California; a comic book shop confrontation, an abandoned mansion, and the tangled strings of fate set the stage for an adventure beyond what even Gravity Falls prepared them for. In the eternal summer of the City of Angels, legends will be written.