Jim Carter, a former stoker, takes over a fairground show, run by 'Pop' McWade, which depicts scenes from Dante's Inferno. He marries Pop's niece Betty and they have a son, Alexander. Meanwhile, the show becomes a great success, with Carter making it larger and more lurid. An inspector declares the fair unsafe but Carter bribes him into silence. There is a partial collapse at the fair which injures Pop. Recovering in hospital, he admonishes Carter and we see a lengthy vision of the Inferno. Undeterred, Carter establishes a new venture with an unsafe floating casino, only for disaster to strike again at sea.