Synopsis: Lester Dunn led a rather drab, unremarkable life as the owner of a not very prosperous pharmacy in a not very prosperous affluent London neighborhood. Grant Livesey lived a life of quiet luxury well-appointed house in the country. Yet, Lester Dunn and Grant Lievesy appeared to be the same person. Could the brain operation performed on Dunn have changed him into Livesey? Could one of his existences be merely a dream? Or could it be a frightening premonition of a disaster he was fated to bring upon himself?

Here is L. P. Davies at the top of his form, weaving dream and reality into a masterful tale of suspense and illusion. A tale of psychological suspense in which a dull pharmacist and a prosperous investor seem to be the same person. He wonders whether one of his existences is only a dream, and which one. What at first appears to be a purely intellectual mystery turns into a clever crime story. — quoted from the inside front cover flap.

Then he was standing in the place which had been the focal point of the dream. A dream that had been something much more than just an ordinary dream. A dream that was intruding upon real life, that refused to be dislodged from the forefront of his mind, that was like a ghost that must be laid — that would continue to plague him remorselessly until it had been laid.

But was it really just a dream? Could its ghost be laid before it became a terrifying reality?