A shoot out after a robbery ends with the death of the Chief of Police. Police detective Ghini goes in search of a suspect, Lanza, to avenge the death of his boss. Ghini's search leads him to Belli, a Sicilian gangster and 'Trashy', the dirty leader of a gang of killers. The action is violent as both police and criminals track down Belli who still finds some time to attempt a couple of robberies...

Police believe that a respectable industrialist is actually the head of drug smuggling ring in Milan.

Federico, his girlfriend Laura and her cousin, Caterina, are three young people full of hope, united by a great friendship that seems indissoluble. The three work in a department store but, when Caterina decides to attempt a musical career, given her vocal skills, everything changes. Caterina becomes a successful singer and Federico falls in love with her. Caterina, who however does not want to make her cousin Laura suffer, pretends not to reciprocate the young man by making him put his head in order. Meanwhile, the plots of various secondary characters evolve, in particular the fresh marriage between the security guard Antonio and the secretary of the department stores Adelina.

Two youths who work together in a department store love each other but also their supervisor has his eyes on the young girl.