'Cymbeline' is a play by William Shakespeare set in Ancient Britain and based on legends that formed part of the Matter of Britain concerning the early Celtic British King Cunobeline. The play revolves around the story of Cymbeline, the Roman Empire's vassal king of Britain, who once had two sons, Guiderius and Arvirargus, but they were stolen 20 years earlier as infants by an exiled traitor named Belarius. Cymbeline discovers that his only child left, his daughter Imogen (or Innogen), has secretly married her lover Posthumus Leonatus, a member of Cymbeline's court. The lovers have exchanged jewelry as tokens: Imogen with a bracelet, and Posthumus with a ring.