The film stars Malcolm McDowell, in his feature debut, as Mick Travis, a rebellious young teenager who attends a preparatory school in England. He and his friends could care less about all of the posturing and formalness that the school is trying to force down their throats, and do all they can to break away from it (even with the knowledge that they will be punished for their actions, and punished more and more severely the more they do). Mick is determined to live life his own way, though, and not give into his "masters".
If... is like a record of the final breakdown of the general acceptance of this upper class attitude in England. After this period, people of this class would never see the kind of respect they had always had, and people like Mick would be the one's to usher that in. If... is the perfect counter cultural movie for its time. It isn't preachy, it doesn't try to solve every problem. It simply presents a world and a time as its disintegrating.