Brother and sister Viola and Sebastian, who are not only very close but look a great deal alike, are in a shipwreck, and both think the other dead. When she lands in a foreign country, Viola dresses as her brother and adopts the name Cesario, becoming a trusted friend and confidante to the Count Orsino. Orsino is madly in love with the lady Olivia, who is in mourning due to her brother's recent death, which she uses as an excuse to avoid seeing the count, whom she does not love. He sends Cesario to do his wooing, and Olivia falls in love with the disguised maiden.