 The young Vinicius is a young saxophone player, from Rio s poor suburbs, facing an uncertain but perhaps promising future. One day his girlfriend suddenly disappears after a night of love under the stars. Day and night, often on the  Trem  (Rio s subway lines), others with the help of a Detective and his sources, Vinicius discovers the city s underbelly: its low-lives, its victims, its most eccentric characters, and milieus.