Leonardo and Riario are to be sacrificed by Sapa Inca; Zo and Nico are to be enslaved. However, they escape, and Leo takes the key to the vault back from Ima. They enter the vault, but instead of the Book, find a brazen head with Leonardo's mother's voice recorded in it. Using makeshift parachutes, they escape from the vault; Ima is devastated by the absence of the Book of Leaves. Leonardo and the others are picked up by Amerigo. Outside Constantinople, Lucrezia convinces the Sultan's son to visit the Pope in Rome, who promptly rejects his offer of peace and humiliates him. In Naples, Lorenzo is forced to surrender to King Ferrante and The Pope.
