Cymbeline, the King of Britain, is a widower with three children. His two boys (Guiderius and Arviragus) were kidnapped 20 years ago at age three, leaving his daughter, Imogen, as the only heir to the throne. Cymbeline marries, gaining a stepson, Cloten (rhymes with rotten) through his wife, the Queen, begotten from a previous marriage. Cymbeline wishes Imogen to marry her stepbrother, Cloten. Imogen disobeys and marries her childhood friend Posthumus Leonatus. Cymbeline, outraged, banishes Posthumus from Britain and imprisons Imogen (to the castle only, however).