Sebastian (Steven Mackintosh Steven Mackintosh) and Viola (Imogen Stubbs Imogen Stubbs) are sibling twins. Sebastian's whereabouts are unknown when they are killed in a storm and Viola narrowly escaped death. In order to find her brother, Viola did not hesitate to dress up as a man and became the personal attendant of the Duke of Osino (Toby Stephens Toby Stephens). The Duke of Osino is deeply in love with a woman named Olivia (Helena Bonham Carter Helena Bonham Carter), but Olivia refuses to meet because of life changes. The Duke sent Viola to Olivia to lobby and intercede. To their surprise, Olivia seemed to have a soft spot for Viola. The bad thing is, Viola fell in love with the kind Duke of Osino, what will happen to a complicated relationship between the three?