Discovering the existence of a grandson, the marquis Lucrezia Sciarra immediately goes to Cave, the inn of the three moons, looking for Isabella. He does not know that the girl is at that time in prison at Kruger Palace and is about to become the object of the desire for a turbulent festin from which he is saved in extremis by Rocco, who breaks into the villa together with two thieves, sent by Cesarone to a robbery. It will be Adelasia, the mafioso wife, madly in love with Rocco, to warn him of the danger. When Julius confesses to her that her father was killed by order of Cardinal Rospigliosi and that he had contacts with Achille Gandolfini, head of Roman carbonerie, Isabella claims to attend secret meetings. Meanwhile, the carbonarians decide to publish the truth about the statue of Pasquino, and Giulio and Isabella volunteers to provide the flyer. Fortunately, Rocco, on the traces of the friend he always loves, follows them and saves them from the papal guards lurking near the ...