Plot Summary:A quarrel between divorced waitress Mája ( ) and her fifteen-year-old son Petr ( ) ends with the boy physically attacking his mother, and he is sent to an institution for juvenile delinquents. Over three years Petr successfully trains and qualifies as a carpenter, but consistently refuses to see his mother. Nonetheless, the experienced director Janes ( ) hopes that Petr will manage to make a new life for himself with his mother. Petr is now of age and returns to Prague.