It's the mid-90s, after leaving graduate school to pursue her dream of becoming a writer, Joanna (Margaret Qualley) gets hired as an assistant to Margaret (Sigourney Weaver), the stoic and old-fashioned literary agent of J. D. Salinger. Joanna's main task is processing Salinger's voluminous fan mail, but as she reads the heart-wrenching letters from around the world, she becomes reluctant to send the agency's standard letter and begins personalising the responses. As Joanna begins to discover her own voice, she puts everything else at risk� Based on Joanna Rakoff's internationally bestselling memoir.