From the window of her immaculate New York apartment, lonely housewife Diane Arbus (Kidman) locks eyes with a masked figure on the street, a mysterious new neighbor (Downey, Jr.) whose penetrating gaze strips the veneer off her tidy reality. Mysteriously drawn to the man that intrigues her and determined to take his photograph, Diane ventures to his apartment and embarks on a journey that will unlock her deepest secrets, awaken her remarkable artistic genius, and launches Diane on her path to becoming the artist she is meant to be.