Iago is angry that Othello, the general of the army, has promoted Cassio to be his lieutenant instead of Iago.
I am not happy
You are Promoted
Othello has secretly married Desdemona, the daughter of a senator in Venice. Also Iago tells Desdemona's father about the secret marriage to cause trouble for Othello.
I love you
I'm Going to Snitch to your Dad
Desdemona’s father makes a formal complaint about Othello’s behaviour to the Duke of Venice. His complaint is ignored and the Duke sends Othello to Cyprus to continue fighting in a war.
I don't like Othello
Okay I'll send him to war.
Othello goes to Cyprus and takes his new wife Desdemona with him, together with Iago and Michael Cassio. Cassio ends up in a drunken fight and is demoted from his position as lieutenant.
Desdemona pleads with Othello to give Cassio his job back. She does this innocently but Othello takes this as proof of her feelings for Cassio.Iago continues to manipulate Othello to the point where Othello murders his new wife as punishment for her supposed unfaithfulness.
Iago’s wife, Emilia, tells Othello that Iago has lied. Othello realises his tragic mistake and commits suicide over the body of his wife as Iago is arrested.