Vivian feels left behind when her older sister, Audra, runs away from home. She believes that Audra will return and pays careful attention to the clues around her. Then, inexplicably, writing begins to appear in a blank notebook. When Audra does come back for Vivian, she's in the company of a strange man. The three of them run away together and practice wilderness survival. While Audra plans for the future, Vivian continues to gather evidence: Who...