Shakespeare's "Twelfth Night" is a comedic play written in the early 17th century. It revolves around themes of love, mistaken identities, and the complexities of gender. The story follows Viola, who disguises herself as a man named Cesario after being shipwrecked in the fictional land of Illyria. As Viola navigates her new identity, she becomes entangled in a love triangle involving Duke Orsino, who loves Olivia, a noblewoman mourning her brother. The play explores the humorous consequences of deception and the nature of love, ultimately leading to multiple marriages and reconciliations.