A girl has been asleep in a tower for 400 years, dreaming of birdsong.

Across town, her sister casts spells to try to put herself to sleep.

An old woman has two daughters called Sleeping and Waking: taking the form of a bird she watches them through windows.

A five-minute opera by singer and first-time composer Bryony Purdue approaches the distancing effects of isolation through the language of folk tales.