Should you find yourself in need of a discreet investigation into any sort of mystery, crime or puzzling circumstances, think of Jesperson and Lane . . .
For several years Miss Lane was companion, amanuensis, collaborator and friend to the lady known to the Psychical Societs only as Miss X - until she discovered that Miss X was actually a fraud.

Now she works with Mr Jasper Jesperson as a consulting detective, but the cases are not as plentiful as they might be and money is getting tight - until a case that reaches across the entirety of London lands in their laps.

It concerns a somnambulist, the disappearance of several mediums, and a cat stuck up a tree . . . the links with the cat are negligible, but there is only one team that can investigate the seemingly supernatural disappearances of the psychics and defy the nefarious purpose behind them: Jesperson and Lane, at your service.