Mrs Wood is London's most celebrated medium.

She's managed to survive decades in the competitive world of contacting the Other Side, has avoided the dreaded slips that revealed others as frauds and is still hosting packed-out seances for Victorian high society. Yet, some of her patrons have recently cancelled their appointments.

There are reports of American mediums nearly materialising full spirits and audiences are no longer satisfied with the knocking on tables and candle theatrics of years gone by. And then, at one of Mrs Wood's routine gatherings, she hears something terrifying - faint, but unmistakable: a yawn. Mrs Wood needs to spice up her brand. She decides to take on Emmie, a young protege, to join her show.

But is Emmie Finch the naive ingenue she seems to be? Or does she pose more of a threat to Mrs Wood's reign and, more horrifyingly, her reputation than Mrs Wood could ever have imagined?