Adrián, a businessman who runs his wife's family industry, begins an affair with Marisa, an employee at his office. Marisa tries to blackmail her mature boss who has fallen into her trap. But the plot takes an unexpected turn, and it turns out that he is the one who dominates the situation and uses the young woman for his own benefit.

Perros Callejeros is based on the juvenile delinquency of the 1970s and 80s in Spain. The story is set in Barrio de la Mina in Barcelona one of the most conflict neighbourhoods in Spain. The characters chosen were real juvenile delinquents all with criminal records, which the director used to give the film a realistic touch. This film is very powerful and dramatic, it shows how these kids were brought up to survive on the streets.

In June 1808, Napoleon's troops invade Spain. A boy named Isidro will beat his drum in the mountains of El Bruc, making the French army believe that thousands of armed men are waiting to confront them.