Trapped in the desperate slums of Havana, young Raul dreams of escaping to Miami. After he is accused of assault, his only option to save himself is to flee the country. He begs his best friend Elio to abandon his life in Cuba and help him reach the forbidden land 90 miles across the ocean. But Elio is torn between helping Raul escape and protecting his twin sister Lila, and soon the trio's commitment to their homeland and their desire of starting life anew in America is put to the test. Brimming with the nervous energy of Havana's restless youth, UNA NOCHE follows one sweltering day in the crumbling sun-bleached capital, a day full of hope and fraught with tension that burns to a shocking climax.