Manhattan, Upper West Side, 1957. Against the backdrop of the decaying tenements in the San Juan Hill neighborhood and the constant threat of the wrecking ball, two warring gangs — tough Riff's Jets and swaggering Bernardo's Puerto Rican Sharks — fight for supremacy. Now, with a once-and-for-all, winner-takes-all rumble on the cards, an unexpected whirlwind romance at the high-school dance between former Jet brawler Tony and Bernardo's delicate little sister María sets the stage for an all-out turf war.