Louis and Broglie confess that they have been behind the murder of Lia all along. They explain it was prophesied through the Royal Psalms that Maximilen, unveiled as the King's true son, would destroy the royal family. Maximilien had been switched at birth, not to have ties to the royal family. The reason why King kept Maximilen and Lia apart was because they share the same father through separate marriages. Lia, swearing loyalty to the throne must protect Louis from Lorenza and Maximilien, with Robin and Cagliostro in tow. Saint-Germain, now a Gargoyle, then crashes through the window and attempts to grab the Royal Psalms from Louis, but is ultimately killed by Lia. Brogie tries to impale Maximilien with his sword, but the latter blinds the former as he falls to the ground. Lia leaves and later meets Maximilen in the gardens, where he finally succumbs to his wound and dies after giving his name and quest for revolution to Robin, destroying the site in the process. D'Eon returns to Lia's tomb and reads the last verse of the Royal Psalms that she had hidden within herself and then sets fire to her body as it floats down the river. The two of them, still sharing his body, then live as a woman and witness the fall of the French monarchy as well as the death of Robin by the guillotine. He lives out his remaining days with Mary, the former queen of England, recalling his past experiences and the loss of all his loved ones.