When a 19th Century mild-mannered physician returns to Whitby, England from his stay at colonial India, to assist his friend with his scientific investigation into the human mind he finds that the patient he is supposed to treat for multiple personality disorder is not a run-of-the-mill case but a case involving supernatural elements.
Will he be able to unravel the mystery behind the spirits haunting an asylum inmate or will he fall prey to the insanity himself?
The story pitches Victorian era spiritualism against Edwardian era psychiatry.