bˈɑːɹt fˈɪltʃᵻz hɪz mˈʌðɚz mˈænjuːskɹˌɪpt pˈeɪdʒᵻz ænd ɪz ɛnɹˈeɪdʒd tə lˈɜːn ðə tɹˈuːθ ɐbˌaʊt hɪz pˈɛɹənts: kˈæθi ænd kɹˈɪs ɑːɹ bɹˈʌðɚ ænd sˈɪstɚ, ænd hɪz ɡɹˈændmʌðɚ lˈɑːkt ðˌɛm ɪn ɐn ˈæɾɪk fɔːɹ jˈɪɹz, slˈoʊli pˈɔɪzənɪŋ ðˌɛm tə ɡˈeɪn ɐn ɪnhˈɛɹɪtəns.
Bart filches his mother's manuscript pages and is enraged to learn the truth about his parents: Cathy and Chris are brother and sister, and his grandmother locked them in an attic for years, slowly poisoning them to gain an inheritance.