Viola is shipwrecked on the coast of Illyria and she comes ashore with the help of a Captain. She has lost contact with her twin brother, Sebastian, who she believes to be drowned. With the aid of the Captain, she disguises herself as a young man under the name Cesario, and enters the service of Duke Orsino. Duke Orsino has convinced himself that he is in love with Olivia, who is mourning the recent deaths of her father and brother. She refuses to see entertainments, be in the company of men, or accept love or marriage proposals from anyone, the Duke included, until seven years have passed. Duke Orsino then uses 'Cesario' as an intermediary to profess his passionate love before Olivia. Olivia, however, falls in love with 'Cesario', setting her at odds with her professed duty. In the meantime, Viola has fallen in love with the Duke Orsino, creating a love triangle among Duke Orsino, Olivia and Viola: Viola loves Duke Orsino, Duke Orsino loves Olivia, and Olivia loves Viola disguised as Cesario.