The needy and traumatized Theresa, who was raped when she was fourteen year-old, meets the handsome John on the street after an accident during a performance on the stage of her friend Kim asking for a low-budget hotel. She offers a ride to a nearby hostel, they date and she brings him home, where he offers Ecstasy with wine to her. Kim advises her that John is a dangerous drug-dealer that has been missing for five years after the death of his girlfriend also called Theresa, but Theresa stays with him, practicing mutual masturbation, sharing her fears and fantasies and being permanently drugged. When John's friend Billy visits Theresa, he reveals dark secrets about her boyfriend, leading to a tragic end.

In a near-future Britain, young Alexander DeLarge and his pals get their kicks beating and raping anyone they please. When not destroying the lives of others, Alex swoons to the music of Beethoven. The state, eager to crack down on juvenile crime, gives an incarcerated Alex the option to undergo an invasive procedure that'll rob him of all personal agency. In a time when conscience is a commodity, can Alex change his tune?