A story of mystery, love and fantasy as a young girl named Pacifica enters the small town named Reverse Falls.

Rich and jolly, sweet, care-free Pacifica Southeast was sent to Oregon by her beloved parents as they will leave Piedmont, California for the summer as they will go to Japan for their business. Living in a well-guarded and strict-ruled mansion in Piedmont, Pacifica was at her happiest moment when she saw that she will live with her worrisome favorite cousin, Gideon Gleeful, and money-loving uncle, Bud Gleeful, who owns a tourist trap named "Telepathy Shack". Let us follow Pacifica's adventure with her cousin, and her worst nightmare and greatest dream, Dipper and Mabel Pines.

Pacifica Southeast arrives in Gravity Falls for the summer, to stay with her Uncle Bud and Cousin Gideon. Nice as it is in the falls, trouble comes to town shortly after Pacifica arrives. Trouble by the name of Dipper Gleeful, and his twin, Mabel Gleeful.