In 1969, a student from a private school in Pennsylvania (Alex Wolff) leaves home to track down the author of “Catcher in the Rye” in the New Hampshire countryside. His goal is to obtain permission to adapt the novel into a stage production. Stefania LaVie Owen portrays a girl from another school who joins him on his journey, and Chris Cooper takes on the role of the famously private J.D. Salinger. "Coming through…