It is a hot and humid August day in Rome, and competitive twin boys Ignatius and Paulus are arguing as only brothers can. The boys and their parents live and work in the home of a wealthy Christian couple, Master Giovanni and Mistress Julia. One afternoon, when the boys suffer an unfortunate mishap, a wedge is driven between them. Meanwhile, in answer to a prayer from Giovanni and Julia, the Blessed Virgin Mary appears to them and to their...