Twelfth Night is a Shakespearean romantic comedy about mistaken identity, separated twins (Viola and Sebastian), and complicated love triangles, set in the land of Illyria where Viola, disguised as a male page named Cesario, falls for Duke Orsino, who loves Olivia, who in turn falls for Cesario, leading to hilarious confusion resolved by Sebastian's arrival and a subplot involving tricks played on the steward Malvolio. The play explores themes of love, disguise, deception, and misrule.