Isaura was son of a pretty slave. For not accepting the sórdidos desires of comendador Mr. Almeida the owner of the house suffered the most terrible privations. This slave had a case with the administrator Miguel, who was a good man and he did not accept to punish it as Sir ordered its, being Isaura fruit of this relationship. Isaura was educated by the woman of the comendador, and was endowed with natural goodness and wise person to read, to write, Italian, Frenchman and piano. The woman of the comendador had desire to free Isaura, however she did not make it to have its company. The mother of Leôncio without leaving will dies that freed Isaura. Leôncio is sighted by Enrique and Malvina when it made fellow creature proposal to the Isaura. At the same moment of the quarrel, he appears the father of Isaura with the enough money, to buy the freedom of it. As Isaura it continued to resist, Leôncio threat with tortures. Miguel, knowing of the happened one, decides to run away with northward Isaura. It sights Isaura when taking a walk, starting to visit it constantly. Alvaro if uses of all the half ones to convince Isaura to go to a ball with it It provokes a scandal during the ball and Isaura ahead confesses of all the society that was a slave. Isaura counts that it ran away to escape of the love of one libidinous and cruel gentleman. Leôncio appears for its surprise and demands to take Isaura. Miguel is ludibriado in the chain and convinced to try to persuade Isaura if to marry Belchior, the gardener of the farm, in exchange for the freedom its and of the son. Isaura hugs Alvaro. Leôncio swears that never it will go to beg its generosity to soften the debt. It absents itself of the suicidal room and if.