In the kingdom of Illyria, Orsino (a nobleman), he fall in love to Lady Olivia.
He cannot have her because she is in mourning for her dead brother and she refuses the marriage.
While, in the cost, a storm caused a terrible shipwreck.
A young woman, aristocratic, called Viola stay alone in Illyrian cost, she assumes that her brother Sebastian die in the wreck. Shethinks about kinds of jobs she can make; a friendly sea captain tells her about Orsino's courtship of Olivia, and Viola think to work in Olivia's home. But Olivia don't want to speak with any strangers, then Viola decides to disguise herself as a man, taking on the name of Cesario, and goes to work in the household of Duke Osino.
Then Cesario work with Orsino, Viola loves Orsino, Orsino lovesOlivia and Olivia loves Cesario.
The other members of the Olivia's home are: Sir Toby (the uncle), Sir Andrew Aguecheek (a friend), who is trying in his hopeless way to court Olivia; Maria (the serving-woman); and Malvolio (the churchwarden).
When Sir Toby and the others take the offence at Malvolio's constant efforts to spoil their fun, Maria engineers a practical joke to make Malvoliothink that Olivia is in love with him.
Maria write a letter (supposedly from Olivia) telling him that if he wants to earn her favour, he should dress in yellow, stockings and crossed garters, act haughtily, smile constantly and refuse to explain himself to anyone. Malvolio find the letter and thinking to marrying with Olivia follows her commands.
Malvolio behaves so strangely that Olivia comesto think that he is mad.
Meanwhile, Sebastian, who is still alive after all but believes his sister Viola to be dead, arrives in Illyria with his friend and protector Antonio, Antonio has cared for Sebastian since the shipwreck and is passionately attached to the young man, so much so that he follows him to Orsino's domain, in spite of the fact that he and Orsino are old enemies.
Sir Andrew,seeing Olivia's attraction to Cesario, challenges Cesario to a duel. Sir Andrew and Sir Toby end up coming to blows with Sebastian, thinking that he is Cesario. Olivia enters amid the confusion. Encountering Sebastian and thinking that he is Cesario, she asks him to marry her. He sees the she is wealthy and beautiful, and he accept.
Meanwhile, Antonio has been arrested by Orsino's offices andnow begs Cesario for help, mistaking him for Sebastian.
Viola denies knowing Antonio, and Antonio is dragged off, crying out that Sebastian has betrayed him. Suddenly, Viola hopes that her brother may be alive.
Malvolio is closed in a small room, for he's supposed madness.
In the future Olivia welcomes Cesario as her new husband.
Orsino is furious, but Sebastian appears and all isrevealed.
The brothers meet again, Orsino understand that he loves Viola, now that knows she is a woman, and asks her to marry him.
Toby and Maria have also been married privately.
Finally Malvolio go out to the dark room, the trick is revealed in full, and the embittered Malvolio storms off, leaving the happy couples to their celebration.
Viola - A young woman ofaristocratic birth, and the play's protagonist. Washed up on the shore of Illyria when her ship is wrecked in a storm, Viola decides to make her own way in the world. She disguises herself as a young man, calling herself "Cesario," and becomes a page to Duke Orsino. She ends up falling in love with Orsino, even as Olivia, the woman Orsino is courting, falls in love with Cesario. Thus, Viola finds that herclever disguise has entrapped her: she cannot tell Orsino that she loves him, and she cannot tell Olivia why she, as Cesario, cannot love her. Her poignant plight is the central conflict in the play.
Orsino - A powerful nobleman in the country of Illyria. Orsino is lovesick for the beautiful Lady Olivia, but finds himself becoming more and more fond of his handsome new page boy, Cesario, who...