The twin Sebastian and Viola accidentally separated.
The brother was saved by the pirate captain Antonio. They became sworn friends. The sister Viola disguised herself as a man and assumed the alias of Cesario. She went to Orsino's house as a servant and fell in love with her master Orsino.
Later, Orsino asked Viola to propose marriage to Olivia, but Olivia fell in love with Viola.
However, Olivia's uncle Tovy insisted that Olivia marry the ugly Andrew, so Andrew found Viola to fight, and Antonio happened to meet him. He mistakenly thought that Viola was her brother Sebastian, so he pulled out a knife and saved viola.
At the same time, the brother Sebastian accidentally met Olivia, who also falsely recognized Sebastian as Viola, so she showed her heart to him and the two married.
Finally, the sister and brother met again, and the owner oshino was touched by the character of Viola and announced that he would take her as his wife.
