The French Mesmerist Madame Davignon claims to unite the bereaved with the spirits of their loved ones. A simple enough swindle.

To start.

But when the game mounts to blackmail, then murder, Detective Inspector Nat Frayne poses as a client, hoping to entrap the medium.

Instead, the hunter becomes the hunted when she unites him with the spirit of Sarah, his dead wife.

Illusion. It must be illusion.

Yet he cannot tear himself away.

From either Sarah, or Madame Davignon.