A novice teacher faces a class of rowdy, undisciplined working-class teenagers in this classic film that reflected some of the problems and fears that existed among young people in the 1960s. Sidney Poitier gives one of his finest performances as Mark Thackeray, an out-of-work engineer who turns to teaching in London's tough East End. The graduating class, led by Denham (Christian Roberts), Pamela (Judy Geeson) and Barbara (Lulu, who also sings the hit title song), sets out to destroy Thackeray as they did his predecessor, by breaking his spirit. But Thackeray, no stranger to hostility, meets the challenge by treating the students as young adults who will soon enter a work force where they must stand or fall on their own. When offered an engineering job, Thackeray must decide if he wants to stay.