Long-married filmmakers (Gere and Keaton) have cast overemotional actors (Blake Lively and Lin-Manuel Miranda) to portray their younger selves in the story of their great love. Unfortunately, by the time shooting begins, their fabled marriage is unraveling. The filmmakers want to make a hit; the actors want to tell the true story. Whose version really is the truth? And how do they distinguish between real love and movie love when their lives and their work become hopelessly intertwined?