During the time of Augustus Cæsar, emperor of Rome, there reigned in England (which was then called Britain) a king whose name was Cymbeline.

Cymbeline's first wife died when his three children (two sons and a daughter) were very young. Imogen, the eldest of these children, was brought up in her father's court; but by a strange chance the two sons of Cymbeline were stolen out of their nursery, when the eldest was but three years of age, and the youngest quite an infant: and Cymbeline could never discover what was become of them, or by whom they were conveyed away.