Your favorite psychological horror film.
The rape of a woman while singing "Singin' In The Rain" is juxtaposed in a chilling way. Eventually, the main character, Alex, is sent to prison after his victim dies from injuries sustained in the attack. Once there, he volunteers for a program that will allow for his early release. Using torturous experimental techniques, his penchant for violence is stripped from his being and a mild mannered Alex is set free onto the world.
Finding himself ostracized from his friends and family, the tables turn on Alex and he becomes the victim. The psychological horror that Alex is forced to endure has him going from one extreme to the other. It's a chilling look at the limits of the brain and the individual, from the lens of Stanley Kubrick.
"You try to frighten me. Admit so, sir. This is some new form of torture. Say it, Brother Sir."