A young woman wakes in a strange bed beneath coarse sheets.

The bare walls are a dismal green. A sickly light filters through a metal grille.

Doctor Maynard Straker steps into the room, and speaks.

'Have no fear, Miss Ashton. I am entirely at your service.'

But this is not her name. And she should not be here - in the Asylum.

She is Miss Georgina Ferrars, of Gresham's Yard, London.

And she can prove it. But when Dr Straker sends a telegram to her uncle in London, the reply is swift:

GEORGINA FERRARS HERE STOP
YOUR PATIENT MUST BE IMPOSTER STOP

So begins a gothic mystery of high suspense and terror, as a lone woman, held against her will, must delve as deeply as she can into the void of her memory to uncover the story that will free her.