The true story of suburban housewife Gertrude Baniszewski, who kept a teenage girl locked in the basement of her Indiana home during the 1960s.The true story of suburban housewife Gertrude Baniszewski, who kept a teenage girl locked in the basement of her Indiana home during the 1960s.The true story of suburban housewife Gertrude Baniszewski, who kept a teenage girl locked in the basement of her Indiana home during the 1960s.