A week ago, a well-known industrialist, co-owner of the East India Trading Company, Lord Cornwell, was killed. His body was found under the windows of his own house, as if he had thrown himself out of a window. However, Scotland Yard detectives are sure it was a premeditated murder. They even managed to arrest three suspects. However, there are not enough important details of this crime to blame anyone. It is these details that detective Miles wants to find out from the murdered lord through a medium.
All the suspects, Detective Miles, as well as some interested parties, are invited to a séance at the Poitiers Salon...