Othello in plain English
Five acts, the whole plot, with the turning points flagged. This is the spine you hang every quote and idea on.
A secret marriage, and a grudge is born
Iago is furious that Othello, the great Moorish general of the Venetian army, has promoted Cassio over him. For spite he wakes the senator Brabantio to reveal that Othello has secretly married Brabantio's daughter, Desdemona. Brabantio is outraged, but Desdemona stands up and says she chose Othello freely and loves him. Venice needs Othello to defend Cyprus against a Turkish fleet, so he sails there, and Desdemona goes too. Iago, meanwhile, milks the foolish Roderigo (who wants Desdemona) for money and quietly vows to destroy Othello.
The trap is set
A storm wrecks the Turkish fleet, so the war is over before it starts and the mood turns to celebration. Iago goes to work. He gets Cassio drunk, has Roderigo provoke him, and Cassio ends up in a brawl. Othello, woken by the noise, strips Cassio of his rank as lieutenant. Then Iago, playing the loyal friend, advises Cassio to ask Desdemona to plead with Othello to forgive him, knowing exactly how he will twist their closeness later.
The poison goes in
Desdemona, true to her word, keeps urging Othello to restore Cassio, which only helps Iago. In the famous "temptation scene" Iago drips suspicion into Othello's ear that Desdemona and Cassio are lovers, while warning him to "beware of jealousy, the green-eyed monster". Othello demands proof. By chance Desdemona drops the handkerchief that was Othello's first gift to her. Emilia, Iago's wife, finds it and gives it to Iago, who plants it in Cassio's room. Othello, now tormented, swears revenge, and Iago promises "I am your own forever".
Jealousy takes over
Iago stages a conversation about Cassio's lover Bianca that Othello overhears and misreads as Cassio boasting about Desdemona. Then Othello sees Bianca with the lost handkerchief, which feels like the "proof" he wanted. Consumed, he strikes Desdemona in public and resolves to kill her. Desdemona, bewildered and heartbroken, sings a sad "willow" song, while Emilia argues plainly that wives have the same feelings and rights as their husbands.
The truth comes too late
Iago has Roderigo attack Cassio, then kills Roderigo to silence him. Othello smothers Desdemona in her bed, telling himself he is doing justice. Emilia discovers the murder, realises what her husband has done, and exposes the whole handkerchief plot. Iago kills Emilia for it and is caught. Othello, understanding at last that Desdemona was innocent, gives his final speech and kills himself beside her. Iago refuses to explain himself and is led away to be punished.