After 11 years of marriage, Anna decides to leave Enrico on the very day her husband has organised a surprise birthday party for her. Anna agrees to participate so as not to humiliate Enrico and not to hurt her son Pietro.
Anna and Enrico tried but couldn't make it: the marriage falls apart and they accuse each other. It will be a social worker, Rosa Puglisi, who will have to determine which of the two deserves custody of the child.