 A doctor ( Renato Baldini  (qv)) whose wife has been accidentally killed by a young man ( Decimo Cristiani  (qv)) who lives in an impoverished zone of Madrid, goes there with the intention of taking revenge, but after meeting the man s little sister, he goes through a change of heart and decides to stay and help the people that live there, supported by the benevolent local priest ( Félix Fernández (I)  (qv)).