Shakespeare's famous play of love turned bad by unfounded jealousy, begins in Venice with Iago, a soldier under Othello's command arguing with Roderigo, a wealthy Venetian. Roderigo has paid Iago a considerable sum of money to spy on Othello for him, since he wishes to take Othello's girlfriend, Desdemona as his own.
Roderigo fears that Iago has not been telling him enough about Desdemona and that this proves Iago's real loyalty is to Othello not him.
Iago explains his hatred of Othello for choosing Cassio as his officer or lieutenant and not him as he expected.
To regain Roderigo's trust, Iago and Roderigo inform Brabantio, Desdemona's father of her relationship with Othello, the "Moor" which enrages Brabantio into sending parties out at night to apprehend Othello for what must obviously be in Brabantio's eyes, an abuse of his daughter by Othello...
Iago lies that Roderigo and not himself, was responsible for angering Brabantio against Othello, Iago telling Othello that he should watch out for Brabantio's men who are looking for him.
Othello decides not to hide, since he believes his good name will stand him in good stead.
We learn that Othello has married Desdemona. Brabantio and Roderigo arrive, Brabantio accusing Othello of using magic on his daughter.
Othello stops a fight before it can happen but Othello is called away to discuss a crisis in Cypress, much to the anger of Brabantio who wants justice for what he believes Othello has done to his fair Desdemona.
The Duke is in council with several senators discussing their enemy, the Turks (Turkish people). Brabantio complains to the Duke that Othello bewitched his daughter and had intimate relations with her.
Desdemona is brought in to settle the matter, Othello meanwhile explains how he and Desdemona fell in love. Desdemona confirms this and the Duke advises Brabantio that he would be better off accepting the marriage than complaining and changing nothing.
The Duke orders Othello to Cypress to fight the Turks, with Desdemona to follow, accompanied by the trusted Iago.
Roderigo despairs that his quest for Desdemona is over now that she is married, but Iago tells him not to give up and earn money instead; soon Desdemona will bore of Othello.
Alone, Iago reveals his intention to continue using Roderigo for money and his hatred of Othello (Othello picked Cassio and not Iago for his lieutenant).
Iago explains that his plan is avenge Othello is to suggest to Othello that Cassio is sleeping with Desdemona (Othello's wife).