After moving to a new town, troublemaking teen Jim Stark is supposed to have a clean slate, although being the new kid in town brings its own problems. While searching for some stability, Stark forms a bond with a disturbed classmate, Plato, and falls for local girl Judy. However, Judy is the girlfriend of neighborhood tough, Buzz. When Buzz violently confronts Jim and challenges him to a drag race, the new kid's real troubles begin.

In the slums of the upper West Side of Manhattan, tensions are high as a gang of Polish-Americans compete against a gang of recently immigrated Puerto Ricans, but this doesn't stop two romantics from each gang falling in love.