Carlos da Maia's unwitting love for sister
Carlos da Maia, raised by his grandfather Afonso after his mother Maria Monforte fled with an Italian lover and his father Pedro killed himself, grows into a gifted Lisbon doctor who falls passionately in love with the beautiful Maria Eduarda. Documents delivered by the emigrant Guimarães reveal she is his sister, the daughter taken by their mother decades earlier. Carlos knowingly sleeps with her once more after learning the truth, Afonso dies of grief, and the siblings part forever, with the family line ending in sterile wandering abroad.
