Based on a story that's too shocking to be true -- but is -- director Tommy O'Haver's grisly drama centers on Indiana housewife and mother Gertrude Baniszewski (Catherine Keener), who imprisons and tortures a 16-year-old girl in the basement. When Gertrude takes in boarder Sylvia Likens (Ellen Page), she has no idea that her life will become a horrific nightmare of her own creation. Bradley Whitford co-stars as a prosecutor in the ensuing trial.