Valerio, a blind man of war, and his little sister Fiorella live with Uncle Mario, who has a shop on the coast.

Roberto Biasetti and a friend are unjustly sentenced to sixteen years in prison for murder. The true perpetrator of the crime is a man named Maremmano, who happens to be in the same cell. Released after a partial pardon, he feels indebted to the two men and to Roberto's girlfriend. He returns to prison and confesses his guilt.