In Milan, Romeo and Alfredo are sold as chimney sweeps to different bosses, having to separate, but not before swearing eternal friendship. Romeo is taken by Rossi, his buyer, to his house, where he will start a new life.

After a long time, Romeo and Alfredo finally reunited and joined other young chimney sweeps to form the Black Brothers fraternity with Alfredo in command to confront the Wolf Pack. Romeo tries harder to learn to read inspired by Alfredo. Knowing that Alfredo only has one book and that it is in poor condition, Romeo introduces him to Professor Casella, who offers him to choose a book. Alfredo borrows one from Voltaire dealing with freedom and equality.

In Milan, a wedding of the nobility is taking place and all rich and noble people of the area are invited. Even the king of Italy is expected to come. Then Romeo accidentally meets Bianca, Alfredo's sister who was believed to be missing. When he conveys the good news to him, he learns Alfredo's mysterious story.