Twelfth Night: Or, What You Will is a comedic play that revolves around mistaken identities and love triangles. The story follows the adventures of Viola, who, after being shipwrecked and separated from her twin brother Sebastian, disguises herself as a man named Cesario. As Cesario, she enters the service of Duke Orsino and falls in love with him, even as he sends her to woo the Countess Olivia on his behalf. However, Olivia falls in love with Cesario, not knowing he is actually Viola in disguise. Further confusion ensues when Viola's presumed-dead brother Sebastian arrives, leading to mistaken identities, hilarious mix-ups, and ultimately, happy resolutions.