When the film West Side Story was released in 1961, New York's reviled Puerto Rican community gained some visibility and, over time, both in Spanish Harlem and the Bronx, neighborhoods plagued by poverty, drugs and crime, Hispanic identity was reborn and strengthened, thanks to a syncretic and intentionally popular music that eventually conquered the entire city.

Leon Gast's musical documentary reveals New York City's Latin culture and features live performances of salsa greats The Fania All Stars and The Spanish Speaking People of New York. A document of urban American Hispanic culture, Gast's film captures the rhythms of New York's Spanish Harlem, from illegal cockfights and Santeria rituals to the rooftops and backstreets of El Barrio and the legendary musicians performing at the Cheetah club.

Singer-turned-boxer Andy 'Kid' Clave signs a contract with a shady promoter Joaquin Vargas. But Clave turns against Vargas when the promoter's thugs kill Clave's girlfriend when he thinks about backing out of the contract. While seeking a way to get revenge against Vargas, Clave learns that he has a blood clot in his head. But nothing will deter him from getting his revenge and making a shot at the title.

The Fania All Stars perform for 44,000 fans at Yankee stadium in New York. Besides concert footage, there's also included a history of Salsa, and vintage film clips of Hollywood's portrayal of Latinos in movies during the 1930's and 40's.

A testimony about Afro-Cuban popular music from its origins to the present day.