This is a billdip story. Dipper moves back to gravity falls, into the Mystery Shack. His grunkles believe that the Mystery shack is haunted but can't figure out how to get rid of the apparition because they never see them. His Grunkles move out of the Mystery Shack and years later, when he's old enough, Dipper moves in. He wants to get it back up and running, although his version most everything is real.