Willie Whopper is telling another whopper of a lie, and this one takes him down a volcano into the bowels of Hell. There he meets many historical figures and fictional characters, including Napoleon, Nero, Rasputin, Cleopatra, Simon Legree, Dr. Jekyll and others. Willie's dog has come down with him, and unintentionally gives one of his fleas to Cerberus, thus giving the poor devil dog his own torment. One denizen among the damned (a personification of Prohibition) tries to escape. "Stop him!" cries Satan. Willie, determined to help the Dark One keep the bad soul where he belongs, gives chase. Soon, he and the would-be escapee are racing through the hottest place in Hell: the boiler room.