 Principal Skinner has put Bart in detention . While dusting a desk , he finds an Aramaic inscription . Lisa uses an app to translate it which transports the pair to Hell , which is a school . Bart excels in the diabolical subjects and asks his parents if he can study there permanently , to which they allow . For his final test , he must torture his father Homer ; despite Bart 's hesitation , Homer encourages him to do so as he wants Bart to succeed . A disfigured Homer and the rest of the family proudly watch Bart graduate from Hell school as class valedictorian . 
