London 1920 – Troubled young dancer, Lily, is invited to remote Elmridge House, home of the wealthy theatre benefactor Dr Cuthbertson to escape her troubled past. An isolated guest room and a surprise pregnancy leave her longing to return to the stage and her London life. She soon discovers that Elmridge House is not all that it seems – the house holds secrets which make it difficult for her to leave. Missensham 1942 – Young nurse Ivy Watts is called out to a patient at Elmridge House, home of the aloof Mrs Cuthbertson and reclusive Dr Cuthbertson. Ivy is entranced by the opulence of the house and its glamorous past, but when she tells her mother about Mrs Cuthbertson, her mother becomes fearful and forbids her from returning to the house. What secrets does Elmridge House hold? And why does Ivy's mother live in fear of the mysterious Mrs Cuthbertson?