Mysteries and mistakes

When Soos's younger sister, Valentina, learns that Dipper and Mable Pines are coming to stay in Gravity Falls for the summer, she is quite neutral about the news. While she would love to have a girl her own age to hangout with during her shifts at the Mystery Shack, she knows that Stan will have them counting his counter fit money and scamming tourists all summer anyway. Although her predictions about Stan's nonsense always prove to be true, Valentina soon learns that spending her summer with the Pines twins will turn out much more interesting than she ever thought.