The Maias

Pedro da Maia, meets a beautiful woman called Maria Monforte with whom he gets married despite his father's objection. The marriage produces a son, Carlos Eduardo, and a daughter. Some time later, Maria Monforte falls in love with Tancredo and runs away to Italy with him, taking her daughter along. When Pedro finds out, he goes with his son to his father's house where he commits suicide. Carlos stays at his grandfather's house and is educated by him.
Carlos, becomes a doctor and opens his own office. Later he meets a gorgeous woman, Maria Eduarda. The two fall in love and have dozens of nights together. Eventually Carlos finds out later that Maria lied to him about her past and he starts fearing the worst. In the end, Carlos finds out that Maria is his sister. He informs her that they are siblings and that they cannot live like this anymore. Carlos, to forget his tragedies, goes for a trip around the world.