In a futuristic Britain, Alex DeLarge is the leader of a gang of "droogs", who spend their nights getting high at the Milkbar on drug-laden "milk-plus", after which the gang engages in "a little of the old ultraviolence." Alex pays for his transgressions by submitting to an aversion therapy technique designed to leave him conditioned to become violently ill when he hears classical music, or even thinks of committing a crime...