Edwardian Britain: 1910. Kora Blackmore, thrown into Bedlam mental hospital by her father - Britain's leading industrialist Sir Tantalus Blackmore - is one day visited by a mysterious gentleman, who gains her trust then makes off with her to his family home in Sheffield. But Kora is afflicted with a bizarre condition, that the hospital believes is a second soul - the girl Roka - somehow living inside her. Roka however is much more...