The document provides a summary of Act I of Shakespeare's play Othello. It introduces the main characters and sets up the conflict between Othello and Iago. Iago is bitter about being passed over for a promotion and plots to get revenge on Othello. He manipulates Roderigo and awakens Brabantio to tell him that his daughter Desdemona has run off with Othello. This leads Brabantio to accuse Othello of bewitching Desdemona. The act culminates in Othello defending his marriage to the Duke and insisting it be judged fairly.