Brabantio finds out his daughter got secretly married and goes in search for her.
othello is demanded to be present at the court for urgent state business. othello, brabantio and desdemona are all in the court. brabantio accuses othello of abducting his daughter. the duke is told about the threatened Turkish invasion of Cyprus so he orders othello to to go to cyprus and desdemona requests to go with him and the duke accepted.
othello's arrival is awaited anxiously. desdemona arrives with iago he makes jokes until she is safely reunited with othello. the herald celebrates othello and desdemona's marriage by giving out free drinks. roderigo and cassio got drunk and had a fight iago sounds the alram which brought othello. cassio is dismissed from his office as lieutenant and othello retires with desdemona.
cassio brings musicians to sing to desdemona. othello leaves to inspect the island's fortifactions. desdemona promises cassio that she will intercede for him. as soon as desdemona left iago begins his insinuations.
othello asks desdemona for her handkerchief she replies by saying she lost it othelo then leaves in rage. Cassio and Iago come in Desdemona then tells them othello has been behaving strangely. Emilia suggests his jealous desdemona tells her theres no reason for jealousy.
othello thinks his wife is unfaithful. othello listens to iago and cassio talk about a women. he assumes hat they are discussing desdemona but are discussing bianca and now is covinced of her guilt.