The Tragedy of Othello, the Moor of Venice In a street in Venice, the villain Iago complains to Roderigo that Othello the Moor chose Cassio to be his lieutenant, rather than Iago. Iago vows to stay loyal to Othello only as long as it works to his advantage. They then inform Barbantio that his daughter Desdemona is sleeping with Othello. Barbantio hesitates to believe them, since Roderigo has been an unwelcome suitor to his daughter, but he soon finds she is missing. At Othello\'s house, Cassio and other officers arrive summoning Othello to the Duke of Venice on urgent matters. Barbantio then arrives and orders Othello arrested, until he learns of the Dukes summons. At the Duke\'s chambers, Barbantio accuses Othello of using spells and potions to win Desdemona. He, however, proves this is not so, and Barbantio reluctantly blesses their marriage. We then learn that the Turkish fleet (the Ottomites) is sailing toward Cypress. The Duke asks Othello to go defend it, and Desdemona asks to come with. Othello asks Iago to take care of Desdemona and follow him to Cyprus. Roderigo laments to Iago that he has lost Desdemona since Othello has married her. Iago convinces Roderigo to make money by selling his lands and fighting in wars. Over time, Iago feels Othello will tire of Desdemona and she will again become available. Iago, for his own part, reveals to the audience that he is only using Roderigo for his money. He also begins to plot his revenge against Othello for choosing Cassio.