In contrast to the earlier novel of the trilogy, Quincas Borba was written in third person, telling the story of Rubião, a naive young man who becomes a disciple and later the heir of the titular philosopher Quincas Borba, a character in the earlier novel. While living according to the fictional "Humanitist" philosophy of Quincas Borba, Rubião befriends and is fooled by the greedy Christiano and his wife Sofia who manage to take him for his entire inheritance.
