Iago is passed over for a promotion by his commander, Othello, a Moor and a general in the service of Venice, and vows revenge. Othello has just married Desdemona, the daughter of Brabantio, a Venetian Senator, and Iago enlists the aid of Roderigo, a rejected suitor, to tell Desdemona's father about the marriage. Brabantio goes to seize his daughter, but is interrupted by news of a Turkish attack on Cyprus. The Duke and the Senate convene, and after hearing Desdemona and Othello testify to their love for one another, they allow her to accompany him to Cyprus, which he will defend against the Turks. Iago, whom Othello regards as honest and trustworthy, is given charge of Desdemona on the journey.
At Cyprus, Iago has Roderigo start a brawl, in which Cassio, Othello's
lieutenant, wounds another man. Othello strips Cassio of his command, and Cassio goes to Desdemona to ask her to convince her husband to reinstate him. Iago, meanwhile, sets about convin...