A bored housewife and dutiful assistant to her photographer husband (Burrell), Diane Arbus (Kidman) is starting to feel trapped in her life. When an enigmatic man (Downey Jr.) moves upstairs in her apartment building, Arbus' curiosity cannot be contained. She seeks out this stranger, almost aroused by the mystery of it all, but finds something somewhat horrifying, somewhat fantastic behind his door: a gentleman named Lionel Sweeney, covered head to toe in hair.