Trapped in Stone

Minou Arkansaw and Riddle Castonva, cousins from Chicago, Illinois, move to Gravity Falls, Oregon for the summer with their parents. On their first day in Gravity Falls, they come across the Mystery Shack and decide to go inside, where they meet Dipper and Mabel Pines. After leaving the shack, Riddle quickly loses Minou and searches for her. With no luck in his search, he returns home. Minou finds herself in a small opening in the woods, where a strange statue lies in wait. But she isn't alone, and the second person makes the mistake of shaking the statue's hand.